1 April 1942:
Meanwhile, at 1100, Vice Admiral Ozawa Jisaburo's (former CO of HARUNA) Second Expeditionary Fleet, Mobile Force departs Mergui and steams into the Bay of Bengal to attack merchant shipping with CruDiv 4's CHOKAI and CruDiv 7's SUZUYA,
KUMANO, MIKUMA and MOGAMI, light cruiser YURA and destroyers AYANAMI, YUGIRI, ASAGIRI and SHIOKAZE. YURA and CHOKAI support CarDiv 4's light carrier RYUJO.
2 April 1942:
Oiler NIPPON MARU refuels KONGO with 700 metric tons of fuel oil.
4 April 1942:
350 nms S of Ceylon. About 1600, the carrier Striking Force is located by a Consolidated PBY "Catalina" QL-A seaplane of 413 Squadron, Royal Canadian Air Force (RCAF) flown by squadron leader Leonard Birchall, out
of Koggala. Birchall manages to radio in the position of the Japanese fleet and alert Colombo about the impending attack before his Catalina is shot down by six A6M2 Zeke fighters from carrier HIRYU. Birchall is one of the six survivors of the crew of nine.
5 April 1942, Easter Sunday: The Attack on the British naval base at Columbo:
At 0730, 127 aircraft from the Striking Force (53 Nakajima B5N2 “Kate” dive-bombers [18 from SORYU, 18 from HIRYU and 17 from AKAGI], 38 Aichi D3A1 “Val” torpedo-bombers [19 each from
SHOKAKU and ZUIKAKU] and 36 Mitsubishi A6M “Zeke” fighters (9 each from AKAGI, SORYU, HIRYU and ZUIKAKU) of the "Kido Butai's" aircraft, led by Cdr (later Captain) Fuchida Mitsuo (of Pearl Harbor), attack the British naval base at
Columbo, Ceylon(now Sri Lanka).
The planes damage the base's facilities, destroy at least 26 aircraft (6 Fairey "Swordfish", 4 Fairey "Fulmars" and at least 16 Hawker "Hurricanes") and sink destroyer HMS TENEDOS undergoing refit, armed merchant cruiser HMS HECTOR
and 5834-ton Norwegian tanker SOLI. The planes also damage submarine TRUSTY, submarine tender LUCIA, 5,943-ton British freighter BENLEDI and British freighter CLAN MUROCH. 81 civilians and 56 RN personnel are killed at Colombo (TENEDOS 33, HECTOR 4, LUCIA 2, TRUSTY 1, FAA
aircrew and ground crew 12. The Japanese lose seven aircraft (6 D3A Vals, 1 A6M Zeke).
A Kawanishi E7K "Alf" three-seat float biplane from cruiser TONE finds Vice Admiral (later Admiral of the Fleet Sir) James Somerville's (former CO of HMS NORFOLK) British Eastern Fleet's cruisers HMS CORNWALL and HMS DORSETSHIRE at
sea - without air cover. Between 1338-1400, 53 D3A Val dive-bombers (17 from AKAGI, 18 from HIRYU and 18 from SORYU, led by LtCdr Egusa Takashige (SORYU’s Air Group Commander), sink both ships. 424 RN personnel are killed (DORSETSHIRE
234, CORNWALL 190). After the attack, the Striking Force withdraws to the SE and searches unsuccessfully for the rest of Somerville's fleet.
Meanwhile, at 2030, Ozawa's Mobile Force separates into three groups to attack merchant shipping in the Bay of Bengal. CruDiv 7/1's KUMANO and SUZUYA, under Rear Admiral Kurita, form the Northern Group with destroyer SHIRAKUMO.
Carrier RYUJO, CHOKAI, SubRon 5's light cruiser YURA, Des Div 20's YUGIRI and ASAGIRI form the Center Group under Admiral Ozawa. MOGAMI, MIKUMA and destroyer AMAGIRI form the Southern Group.
6 April 1942:
Bay of Bengal. 14 miles E of Calingapatam. YURA and YUGIRI sink 1,279-ton Dutch merchant BATAVIA enroute from Calcutta to Karachi. YURA and YUGIRI also sink 1,279-ton Dutch freighter BANJOEWANGI and 3,471-tonBritish steamer TAKSANG.
Bay of Bengal. After 0730, KUMANO and SUZUYA and destroyer SHIRAKUMO attack a six-ship convoy and sink 4,986-ton American Export Line’s EXMOOR (ex-CITY OF ST. JOSEPH), 9,066-ton British freighter MALDA, 7,621-ton British freighter AUTOCLYCUS and 2,441-ton British freighter SHINKUANG at 19N, 86E. Ozawa's cruisers also sink 6,622-ton British freighter INDORA and Captain J. H. Gregory’s British India Line’s 4,921-ton cargo ship SILKSWORTH. About 50 of SILKSWORTH's mostly Chinese crewmen survive.
25 miles S of Vizagapatam, northern Indian coast. CHOKAI’s floatplanes bomb and sink 5,686-ton American freighter SELMA CITY and 6,426-ton British cargo ship GANGES.
Bay of Bengal. RYUJO's aircraft bomb 5,491-ton American freighter BIENVILLE. She is finished off by a torpedo from CHOKAI.
That same day, CHOKAI sinks 6,426-ton British cargo ship GANGES and RYUJO launches strikes against Cocanada and Vizagapatam. RYUJO's aircraft bomb and sink 2,441 ton British steamship SINKIANG and damage 2,073-ton Dutch freighter
VAN DER CAPELLEN that sinks two days later. RYUJO's aircraft also damage 5,268-ton British freighter ANGLO CANADIAN and 3,827-ton British merchant MARION MOLLER.
9 April 1942: The Attack on the British naval base at Trincomalee:
At 0600, Nagumo's Striking Force launches 127 aircraft led by Cdr Fuchida to attack the British naval base at Trincomalee, Ceylon (91 B5N2 Kate dive-bombers [18 from AKAGI, 18 from SORYU and 18 from HIRYU], 19 from SHOKAKU and 18 from
ZUIKAKU] and 41 A6M2 Zeke fighters [6 from AKAGI, 9 from SORYU, 6 from HIRYU, 10 from SHOKAKU and 10 from ZUIKAKU
The Japanese find the harbor almost empty, but sink 9,066-ton British merchant SAGAING and a "Walrus" amphibian and three crated Fairey “Albacore” aircraft she was carrying and damage old 15-inch monitor HMS EREBUS. They also seriously damage the dockyard and the RAF station at
China Bay, shoot down nine planes and destroy at least 14 aircraft on the ground. 20 military and 38 civilian personnel are killed at Trincomalee including EREBUS 9, naval dockyard personnel 17, 55th LAA Battery 2, and at China Bay 3.
The Japanese lose seven aircraft (4 D3A Vals, 3 A6M Zekes).
HARUNA launches a E8N2 “Dave” floatplane. At 0755, it spots an enemy carrier 65 miles south of the base. At 0900, the Striking Force launches 85 D3A Vals, (18 from SORYU, 18 from HIRYU and 18 from SHOKAKU, 17 from AKAGI and 14
from ZUIKAKU),escorted by 9 A6M Zekes (3 each from AKAGI, SORYU, HIRYU) which sink old light carrier HMS HERMES. 306 RN personnel are KIA, but hospital ship VITA, en route from Trincomalee to Colombo, arrives and picks up over 600
Other sailors are rescued by local craft or swim to shore. Nagumo's aircraft also find and sink Australian destroyer HMAS VAMPIRE, 8 KIA, corvette HMS HOLLYHOCK, 53 KIA, oilers ATHELSTANE and BRITISH SERGEANT and Norwegian merchant
During the day, nine of the Royal Air Force’s No. 11 Squadron’s Bristol "Blenheim" bombers attack KONGO, but score no hits and lose five of their number to Nagumo's Combat Air Patrol’s "Zekes". BatDiv3 and the Striking Force continue
6-9 April 1942:
Ozawa's commerce raiding detachment sinks twenty ships and damage 3 others during their brief foray in the Bay of Bengal. 
10 April 1942:
About midnight, the fleet changes course to the NE. During the next 36 hours, BatDiv 3 and the Striking Force gradually bear
southwards again and pass through the Andaman Sea entering the Straits of Malacca.
13 April 1942:
By nightfall, the fleet passes Singapore and enters the South China Sea, bound for Japan.
14 April 1942:
CarDiv 5 is detached from the Striking Force for refueling at Mako with HAGIKAZE and MAIKAZE.
18 April 1942: The First Bombing of Japan:
Vice Admiral Halsey's Task Force 16.2's USS HORNET (CV-8), VINCENNES (CA-44), NASHVILLE (CL-43), oiler CIMARRON (AO-22) and destroyers GWIN (DD-433), MEREDITH (DD-434), GRAYSON (DD-435) and MONSSEN (DD-436) accompanied by Task Force 16.1's ENTERPRISE (CV-6), SALT LAKE CITY (CA-25), NORTHAMPTON (CA-28), oiler SABINE (AO-25) and destroyers BALCH (DD-363), BENHAM (DD-397), ELLET (DD-398) and FANNING (DD-385) approach the Japanese home islands. The carriers and cruisers come to within 668 nautical miles of Japan.
Led by Lt Col (later General/MOH) James H. Doolittle, 16 Army B-25 "Mitchell" twin-engine bombers of the 17th Bomb Group take off from Captain (later Admiral) Marc A. Mitscher's carrier HORNET and strike targets in Tokyo, Yokohama, Osaka, Nagoya and Kobe. At Yokosuka, a B-25 damages carrier RYUHO in a drydock while undergoing conversion from former submarine depot ship TAIGEI.
TONE and CHIKUMA depart Mako with the Striking Force in an unsuccessful pursuit of of Halsey's ships.
25 April 1942:
Arrives at Maizuru. Refit and drydocked.
3 May 1942:
16 May 1942:
TONE and CHIKUMA depart Maizuru.
18 May 1942:
Arrives at Hashirajima.
27 May 1942: Operation "MI" - The Battle of Midway:
Departs Hashirajima with Vice Admiral (later Admiral, posthumously) Nagumo's Carrier Striking Force: CarDivs 1 and 2, Rear Admiral (later Vice Admiral) Abe Hiroaki's (former CO of FUSO) Support Group's Captain Koma Tomatsu's BatDiv 3/2's HARUNA and KIRISHIMA, Abe's CruDiv 8, Rear Admiral (later Vice Admiral) Kimura Susumu's (former CO of NAGATO) DesRon 10's light cruiser NAGARA with DesDiv 4's NOWAKI, ARASHIO, HAGIKAZE and MAIKAZE, DesDiv 10's KAZAGUMO, YUGUMO and MAKIGUMO, DesDiv 17's URAKAZE, ISOKAZE, TANIKAZE and HAMIKAZE.
4 June 1942:
Between 0435-0500, CruDiv 8's TONE and CHIKUMA each launch two E13A1 Jake long-range reconnaissance floatplanes to search out 300 miles for American carriers from NNE thru S.
TONE and CHIKUMA also each launch one E8N Dave floatplanes on ASW patrol. Each cruiser holds another "Dave" for later use on another ASW mission.
At 0728, TONE's No. 4 E13A1 Jake discovers the American's enemy ships, which later materialize as a carrier group. The observer does not identify the carriers at the outset, which proves to be a crucial mistake.
TONE is attacked by enemy carrier aircraft but sustains no damage. During the battle, TONE's No. 3 E8N2 Dave is lost with her crew.
6 June 1942: Operation "AL" - The Invasion of the Aleutian Islands:
TONE and CHIKUMA are ordered to support Vice Admiral Hosogawa Boshiro's (former CO of MUTSU) Fifth Fleet for the Aleutians invasion. CruDiv 8 joins BatDiv 3/1, carrier ZUIHO, seaplane carrier KAMIKAWA MARU escorted by DesDiv 4's MAIKAZE, HAGIKAZE and NOWAKI that are also detached to join Rear Admiral (later Vice Admiral) Kakuta Kakuji's (former CO of YAMASHIRO) Second Mobile Force. An anticipated American counter-attack fails to materialize. CruDiv 8 cruises northern waters uneventfully.
24 June 1942:
Arrives at Ominato.
28 June July 1942:
CruDiv 8 departs Ominato.
14 July 1942:
Rear Admiral (later Vice Admiral) Hara Chuichi (former CO of HARUNA) assumes command of CruDiv 8 from Rear Admiral Abe who is reassigned as the Commanding Officer of the new BatDiv 11's HIEI and KIRISHIMA.
20 July 1942:
Captain (later Rear Admiral) Kobe Yuji (former CO of YAKUMO) assumes command of TONE. Captain Okada is reassigned as CO of carrier JUNYO.
12 July 1942:
Arrives at Hashirajima.
15 July 1942:
16 July 1942:
Arrives at Maizuru for repairs.
6 August 1942:
Departs Maizuru for Kure.
7 August 1942:
Arrives at Kure.
16 August 1942: Operation "KA" - The Reinforcement of Guadalcanal:
CruDiv 8's TONE and CHIKUMA departs Kure with Nagumo's Third Fleet, Carrier Strike Force, Main Body's CarDiv 1's SHOKAKU and ZUIKAKU and CarDiv 2's RYUJO and destroyers.
20 August 1942:
A planned refueling at Truk is canceled by Admiral Yamamoto. The task force refuels at sea from oilers enroute towards Guadalcanal.
Nagumo's Carrier Strike Force and CruDiv 8's TONE and the CHIKUMA join Kondo's Second Fleet: Rear Admiral (later Vice Admiral) Abe Hiroaki's (former CO of FUSO) Vanguard Force's BatDiv 11's HIEI and KIRISHIMA, CruDiv 4's ATAGO, TAKAO, CHOKAI and MAYA, the Support Force's CHITOSE, CruDiv 5's MYOKO and HAGURO, Desron 10's NAGARA and DesDiv 4’s HATSUKAZE, MAIKAZE, NOWAKI, DesDiv 10’s AKIGUMO, KAZAGUMO, MAKIGUMO and YUGUMO, DesDiv 16's AMATSUKAZE, TOKITSUKAZE, DesDiv 17’s TANIKAZE and DesDiv 61’s AKIZUKI.
24 August 1942: The Battle of the Eastern Solomons:
The Carrier Strike Force, Mobile Force, Main Body's CarDiv 1, BatDiv 11, CruDiv 8's CHIKUMA and Desron 10 cruises NE of Guadalcanal. CruDiv 7's KUMANO, SUZUYA and MOGAMI arrive from Burma and join the Main Body.
At 0400, Rear Admiral Hara's TONE, light carrier RYUJO and DesDiv 16's AMATSUKAZE and TOKITSUKAZE are detached from the Main Body.
At 0935, a Consolidated PBY "Catalina" seaplane spots RYUJO. RYUJO is located and attacked unsuccessfully by two TBFs at 1428 and 1440 by two SBDs from Task Force 16's USS ENTERPRISE (CV-6).
At 1100, TONE and CHIKUMA of the Vanguard Force launch seven floatplanes on a late morning search for American ships.
At 1400, CHIKUMA's No. 2 E13A1 Jake discovers the American task force, but is shot down by USN fighters. Its report and subsequent messages sent by HIEI's F1M2 Pete as well as CHIKUMA's No. 5 floatplane are not picked up by the leader of carrier bomber group.
At 1430, a CHIKUMA floatplane reports the location of Rear Admiral (later Admiral) Thomas C. Kinkaid’s (former CO of INDIANAPOLIS, CA-35) Task Force 16 (ENTERPRISE (CV-6). At 1445, CarDiv 1 launches an air attack against Task Group 16. At 1550, RYUJO is located, attacked and sunk by five TBFs and 21 SBDs from Task Group 11's USS SARATOGA (CV-3). TONE is attacked unsuccessfully by two TBFs whose Mark 13 torpedoes miss the cruiser.
At 1600, CarDiv 1 launches a second strike against Task Group 16, but it fails to locate the ENTERPRISE group. At 1642, ENTERPRISE is attacked by CarDiv 1's first strike. She is hit by three bombs and her wooden flight deck is set afire, but she evades further damage at 24 knots.
5 September 1942:
Arrives at Truk.
9 September 1942:
Sorties from Truk with the Carrier Strike Force and Rear Admiral Abe's Vanguard Force to an area N of the Solomon Islands.
23 September 1942:
Arrives at Truk.
11 October 1942:
CruDiv 8's CHIKUMA and TONE sortie from Truk with Abe's Vanguard Force's BatDiv 11's HIEI and the KIRISHIMA, CruDiv 7’s SUZUYA, DesRon 10's light cruiser NAGARA and DesDiv 10's AKIGUMO, MAKIGUMO, KAZEGUMO, YUGUMO and DesDiv 17's ISOKAZE, TANIKAZE and URAKAZE to an area N of Solomon Islands.
Kondo's Second Fleet, Advance Force also sorties from Truk: CruDiv 5's MYOKO, CruDiv 7's TAKAO, ATAGO and the MAYA, Rear Admiral (later Vice Admiral) Tanaka Raizo's (former CO of KONGO) DesRon 2's light cruiser ISUZU with destroyers KAWAKAZE, MAKINAMI, SUZUKAZE, TAKANAMI, UMIKAZE and NAGANAMI and Vice Admiral Kurita's Second Fleet, Close Support Force's Bat Div 3's KONGO and HARUNA, destroyers HARUSAME, KAGERO, MURASAME, SAMIDARE, OYASHIO and YUDACHI.
The Second Fleet is followed by Nagumo's Third Fleet, Carrier Strike Force. The fleets take up position in an area N of the Solomon Islands.
17-18 October 1942:
The fleet refuels at sea.
19 October 1942:
TONE in company with destroyer TERUZUKI is detached to scout for American ships. Both ships operate off the Santa Cruz Islands until a Kawanishi H6K "Emily" from Jaluit sights a carrier off the New Hebrides. Apparently satisfied that there is to be no surprise attack from an unsuspected direction, Vice Admiral Nagumo recalls the TONE.
26 October 1942: The Battle of Santa Cruz:
250 miles NE of Guadalcanal. At 0415, Rear Admiral Abe's Vanguard Force catapults off seven floatplanes to scout south of the island.
At 0445, 13 Nakajima B5N2 Kate torpedo planes take off from CarDiv 1's decks, followed at 0500 by floatplanes of the Advanced Force. One of TONE floatplanes locates the HORNET (CV-8) group.
The Carrier Strike Force launches attacks against ENTERPRISE (CV-6) and HORNET (CV-8). TONE's four floatplanes provide spotting duties over the American ships. Two are lost during the battle. The Strike Force's planes sinks HORNET, damage SOUTH DAKOTA (BB-57) and SAN JUAN (CL-54).
30 October 1942:
The Second and Third Fleets return to Truk.
9 November 1942:
Vice Admiral Kondo departs Truk for Ontong Java area with his Main Body: CruDiv 4's ATAGO (FF) and TAKAO, Air Striking Unit's carrier JUNYO and her screen's BatDiv 3's KONGO and HARUNA, CruDiv 8's TONE, DesRon 3's light cruiser SENDAI, DesDiv 19's URANAMI, SHIKINAMI and AYANAMI and DesDiv 11's HATSUYUKI and SHIRAYUKI.
The Main Body also includes Vice Admiral Abe's Bombardment Unit's BatDiv 11's HIEI and KIRISHIMA accompanied by Rear Admiral Kimura Susumu's Close Screen's DesRon 10's light cruiser NAGARA, DesDiv 6's IKAZUCHI, INAZUMA and AKATSUKI, DesDiv 16's AMATSUKAZE and YUKIKAZE, DesDiv 61's TERUZUKI and Rear Admiral Takama Tamotsu's (former CO of HARUNA) Sweeping Unit's DesRon 4's ASAGUMO, DesDiv 2's YUDACHI, MURASAME, HARUSUME and SAMIDARE.
The Main Body supports air attacks on USS ENTERPRISE (CV-6) south of Guadalcanal; however, the strike force fails to locate the American carrier.
10 November 1942:
BatDiv 11 and DesDiv 27's SHIGURE, SHIRATSUYU and YUGURE depart Shortland's anchorage to execute Vice Admiral Kondo's planned landing of 14,500 men, heavy weapons and supplies on Guadalcanal. The twelve destroyers of Rear Admiral Tanaka's DesRon 2 will escort an 11-ship high-speed reinforcement convoy.
13 November 1942: The First Naval Battle of Guadalcanal:
The Eastern Reconnaissance Unit's TONE, light cruiser SENDAI and destroyer AYANAMI's mission is to reach the waters E of Tanaka's convoy. TONE floatplanes search the area S of Guadalcanal but find nothing.
18 November 1942:
TONE arrives at Truk. Remains there for the next two months. Performs routine patrol duties.
19 January 1943:
Departs Truk for Jaluit, Marshall Islands.
7 February 1943:
Arrives back at Truk.
15 February 1943:
21 February 1943:
Arrives at Maizuru for a refit. Two additional twin-mount Type 96 25-mm. AA guns are installed and a Type 21 air-search radar is fitted.
15 March 1943:
Rear Admiral (later Vice Admiral) Kishi Fukuji (former CO of FUSO) assumes command of CruDiv 8.
16 March 1943:
Departs Maizuru for Kure.
20 March 1943:
Arrives at Saeki.
22 March 1943:
Joins CHIKUMA at Saeki, then departs for Truk.
27 March 1943:
Arrives at Truk.
11 May 1943: American Operation "Landcrab" - The Invasion of Attu, Aleutians:
Rear Admiral Kinkaid's Task Force 16, covered by Rear Admiral Francis W. Rockwell's (former Co of THATCHER, DD-162) Task Force 51, lands elements of the Army's 4th and 7th Infantry Divisions under the command of Maj Gen Eugene M. Landrum at Holtz Bay and Massacre Bay that later capture the island.
17 May 1943:
CruDiv 8's TONE and CHIKUMA depart Truk for Yokosuka in response to the invasion of Attu with BatDiv 1's MUSASHI, Bat Div 3's KONGO and HARUNA, CarDiv 2's HIYO, DesDiv 24's UMIKAZE and DesDiv 27's ARIAKE and SHIGURE, DesDiv 61's HATSUZUKI and SUZUTSUKI. MUSASHI carries Admiral Yamamoto's ashes to Tokyo for a state funeral.
20 May 1943:
Alerted by an "Ultra" message, USS SAWFISH (SS-276) picks up the task force on radar, but is unable to attack.
22 May 1943:
USS TRIGGER (SS-237) sight the task force off Tokyo Bay, but is unable to attack. The task force arrives at Yokosuka.
30 May 1943:
Departs Yokosuka for Hashirajima.
1 June 1943:
Training in the Inland Sea.
8 July 1943:
At Shinagawa. Embarks army troops and supplies.
9 July 1943:
CruDiv 8's TONE and CHIKUMA depart Shinagawa with a task force: CarDiv 1's SHOKAKU, ZUIKAKU and ZUIHO, cruiser MOGAMI, light cruisers AGANO and OYODO, DesRon 4, DesDiv 4’s ARASHI and HAGIKAZE, DesDiv 17’s ISOKAZE, DesDiv 61’s HATSUZUKI and SUZUTSUKI and destroyer TAMANAMI.
11 July 1943:
The task force is sighted by USS STURGEON (SS-187) and SEARAVEN (SS-196), but neither submarine is able to attack.
15 July 1943:
The task force is sighted by USS TINOSA (SS-283). ZUIHO is attacked unsuccessfully. Four torpedoes miss. Also spotted by USS POGY (SS-266), but the submarine is unable to attack. The task force makes port at Truk unharmed.
19 July 1943:
Departs Truk on a troop transport run with the CHIKUMA, MOGAMI, seaplane tender NISSHIN, light cruisers OYODO and AGANO, DesDiv 4’s ARASHI, HAGIKAZE and ISOKAZE, DesDiv 61’s HATSUZUKI and SUZUTSUKI.
21 July 1943:
Arrives at Rabaul. Disembarks troops.
24 July 1943:
Departs Rabaul with CHIKUMA, MOGAMI, OYODO and AGANO and DesDiv 61.
26 July 1943:
Arrives at Truk.
18 September 1943:
At Truk. The fleet sorties to Brown Island, Eniwetok in response to raids on Tarawa, Makin and Abemama Atolls launched by Rear Admiral Charles A. Pownall's (former CO of RANGER, CV-4) Task Force 15's carriers LEXINGTON (CV-16), PRINCETON (CVL-23) and BELLEAU WOOD (CVL-24).
Vice Admiral Ozawa Jizaburo (former CO of HARUNA), in tactical command, leads the fleet's first section's BatDiv 1's YAMATO and NAGATO, CarDiv 1's SHOKAKU and ZUIKAKU (followed by ZUIHO on 19 September), CruDiv 5's MYOKO and the HAGURO, CruDiv 7's MOGAMI, CruDiv 8's CHIKUMA and TONE, light cruisers AGANO and NOSHIRO and destroyers.
Vice Admiral Kurita leads the second section with his Advance Force: CruDiv 4's ATAGO, TAKAO, MAYA and CHOKAI.
Admiral (Fleet Admiral, posthumously) Koga Mineichi (former CO of ISE), CINC, Combined Fleet, remains at Truk in the fleet's flagship MUSASHI with BatDiv 2's FUSO and BatDiv 3's KONGO and HARUNA.
25 September 1943:
No contact is made with Task Force 15. The fleet arrives back at Truk.
5-6 October 1943:
Rear Admiral (later Vice Admiral) Alfred E. Montgomery's (former CO of RANGER, CV-4) Task Force 14's carriers ESSEX (CV-9), YORKTOWN (CV-10), LEXINGTON (CV-16), INDEPENDENCE (CV-22), BELLEAU WOOD (CVL-24) and COWPENS (CVL-25) launch raids on Wake Island and the Marshall Islands.
17 October 1943:
The Japanese intercept radio traffic that suggests the Americans are planning another raid on Wake. CruDiv 8's CHIKUMA and the TONE sortie from Truk to Brown Atoll, Eniwetok to intercept the enemy task force with Admiral Koga's BatDiv 1's YAMATO, MUSASHI and NAGATO, Bat Div 2's FUSO, Bat Div 3's KONGO and HARUNA, CarDiv 1's SHOKAKU, ZUIKAKU and ZUIHO, CruDiv 4's ATAGO, TAKAO, MAYA and CHOKAI, CruDiv 7's SUZUYA and MOGAMI, light cruisers AGANO and OYODO and many destroyers.
20 October 1943:
Arrives at Brown Island, Eniwetok.
23 October 1943:
Departs Brown and sorties to a position 250 miles S of Wake. Returns after no contact is made with enemy forces.
26 October 1943:
The fleet arrives back at Truk.
31 October 1943:
TONE departs Truk with BatDiv 2’s ISE, YAMASHIRO, CarDiv 2’s JUNYO, escort carrier UNYO, DesDiv 7's AKEBONO, DesDiv 17's TANIKAZE, DesDiv 24's UMIKAZE and SUZUKAZE. Reportedly, TONE leaves all her floatplanes at Truk before departing.
5 November 1943:
The task group is attacked by USS HALIBUT (SS-232) near the Bungo Suido. YAMASHIRO is hit by a dud torpedo, but JUNYO is damaged and has to be towed to Kure.
6 November 1943:
Arrives at Kure. Begins a refit. The forward twin 25-mm. AA mounts are replaced by four triple mounts bringing the total 25-mm. AA barrels to 20 (4 x 3 and 4 x 2).
1 December 1943:
Captain Mayazumi Haruo assumes command.
14 December 1943:
The refit is completed.
23 December 1943:
Departs Kure with CruDiv 5's MYOKO and HAGURO and destroyer SHIRATSUYU carrying army troops and supplies.
29 December 1943:
Arrives at Truk.
1 January 1944:
CruDiv 8 is disbanded. TONE and CHIKUMA are assigned to Rear Admiral (later Vice Admiral) Nishimura Shoji's (former CO of HARUNA) CruDiv 7 with KUMANO and SUZUYA.
2 January 1944:
4 January 1944:
Arrived at Kavieng, disembarks troops.
5 January 1944:
Returned to Truk.
1 February 1944: The Evacuation of Truk:
NAGATO departs Truk for Palau with a task group: battleship FUSO, CruDiv 7's SUZUYA, KUMANO and TONE, DesDiv 17's ISOKAZE, TANIKAZE, HAMAKAZE and URAKAZE and DesDiv 61's AKIZUKI. At 1000, USS PERMIT (SS-178) sights the task group leaving Truk, but is unable to attack.
4 February 1944:
Arrives at Palau.
16 February 1944:
17 February 1944:
Departs Palau with the task group in anticipation of an air raid. An enemy submarine is sighted at 08-00N, 131-00E.
Another enemy submarine is sighted at 05-30N, 125-40E.
20 February 1944:
South China Sea. N of Singapore. After sunset, USS PUFFER (SS-268) sights the 10-ship NAGATO task group, but is unable to attack. The task group sights an enemy submarine, probably PUFFER, at 04-16N, 108-40 E.
21 February 1944:
27 February 1944:
Arrives at Lingga (near Singapore). Participates in battle exercises thereafter.
Departs Lingga with CHIKUMA, AOBA and destroyer URANAMI.
1 March 1944: Operation "SA No. 1"
Arrives at Banka then departs for commerce raiding in the Indian Ocean.
9 March 1944:
The TONE sinks British freighter SS BEHAR. She takes aboard 108 captives, but four die.
15 March 1944:
Arrives at at Batavia. Disembarks 32 POWs.
18 March 1944:
Departs Batavia. Aboard AOBA enroute to Singapore, ComCruDiv 16, Rear Admiral Sakonjo Naomasa (former CO of SETTSU) orders the remaining 72 captives beheaded. 
20 March 1944:
Arrives at Singapore. Rear Admiral (later Vice Admiral) Shiraishi Kazutaka's (former CO of KIRISHIMA) assumes command of CruDiv 7.
1 April 1944:
Departs Singapore with CHIKUMA for Sumbawa and Tengah Islands carrying materials for the 601st NAG that is readying to embark on CarDiv 1's ships.
4 April 1944:
Arrives at Singapore.
5 April 1944:
Arrives at Lingga.
11 May 1944:
At 0300, the Mobile Fleet (except CarDiv 1, CruDiv 5 and DesRon 10) redeploys from Lingga.
12-13 May 1944:
14 May 1944:
At sea. Fleet deployment, firing practice.
Arrives at the old American anchorage at Tawi Tawi in the Sulu Sea.
15 May 1944:
Departs Tawi Tawi for Tarakan, Borneo to refuel.
17 May 1944:
Arrives back at Tawi Tawi.
8 June 1944:
At Tawi Tawi. YAMATO refuels TONE. MUSASHI refuels CHIKUMA.
10 June 1944: Operation "KON" - The Relief of Biak:
Vice Admiral Ugaki's KON task group is detached from the fleet with Bat Div 1’s YAMATO and MUSASHI, DesRon 2's light cruiser NOSHIRO and destroyers OKINAMI and SHIMAKAZE. The KON task group departs Tawi Tawi for Batjan.
13 June 1944: Operation "A-GO" - The Battle of the Philippine Sea:
In Tokyo, the CINC, Combined Fleet, Admiral Toyoda Soemu, (former CO of HYUGA), sends out a signal that activates the A-GO plan for the Defense of the Marianas.
The Mobile Fleet departs Tawi Tawi for Guimaras near Panay, Philippines with Force "B"'s NAGATO, CarDiv 2's JUNYO, HIYO and RYUHO, cruiser MOGAMI and eight destroyers. Force B sorties with Force "A"'s Car Div 1's TAIHO, SHOKAKU and ZUIKAKU, DesRon 10's light cruiser YAHAGI and seven destroyers.
At 1000, on station nearby, LtCdr Marshall H. Austin's USS REDFIN (SS-272) sights and reports the Mobile Fleet departing the anchorage.
14 June 1944:
15 June 1944:
Guimaras, Philippines. Vice Admiral Ozawa's Mobile Fleet's Main Body arrives and the 2nd Supply Force's oilers GENYO and AZUSA MARUs begin refueling operations.
Guimaras. At 0800, refueling is completed and the Mobile Fleet's Main Body departs through the Visayan Sea. At 1622, LtCdr Robert Risser's USS FLYING FISH (SS-229) sights the Mobile Fleet in the San Bernardino Strait.
16 June 1944:
At 1650, Vice Admiral Ugaki's aborted Operation KON task force from Batjan rejoins Ozawa's force. The 1st Supply Force's oilers HAYUSUI and NICHIEI, KOKUYO and SEIYO MARUs rendezvous with Vice Admiral Ozawa Jisaburo's (former CO of HARUNA) First Mobile Fleet's Main Body. The 1st Supply Force begins to refuel the Mobile Fleet.
17 June 1944:
KOKUYO refuels CruDiv 7's TONE and SUZUYA. By 2000, refueling of the First Mobile Fleet's Main Body is completed. At this time, the First Mobile Fleet is at 12-15N, 132-45E. The oilers depart the area for a designated standby point at 14-40N, 134-20E.
That same day, LtCdr (later Rear Admiral) Herman J. Kossler in USS CAVALLA (SS-244) sights the Mobile Fleet in the Philippine Sea and reports later that evening after surfacing.
18 June 1944:
At 2100, Ozawa splits his Mobile Fleet. Forces A and B proceed southward. Force C proceeds due east in the Philippine Sea towards Saipan.
19 June 1944:
At 1030, Ozawa launches a strike against Task Force 58, but his aircraft are unable to locate the TF, so most return to Guam.
20 June 1944:
At about 2030, carrier HIYO explodes and sinks two hours after she is hit by torpedoes by Grumman TBF "Avenger" torpedo planes from USS BELLEAU WOOD (CVL-24). That night, the Mobile Fleet retires to Nakagusuku Wan (Bay), Okinawa.
22 June 1944:
At Okinawa. Battleships refuel destroyers.
23 June 1944:
The Mobile Fleet departs Nakagusuku for Hashirajima.
24 June 1944:
26 June-8 July 1944:
Arrives at Hashirajima.
In drydock at Kure. Four triple-mount Type 96 25-mm AA guns are added, two abreast the bridge and two on the quarterdeck replacing the twin-mounts. Single mount 25-mm. AA guns are also installed bringing the TONE's total 25-mm AA suite to 57 barrels (8x3, 4x2, 25x1). New antennas are installed for the two Type 22 surface-search radars and a Type 13 air-search radar is fitted.
8-10 July 1944:
CruDiv 7's TONE, CHIKUMA, KUMANO and SUZUYA depart Kure with Group "B"'s battleships KONGO and NAGATO, cruiser MOGAMI, DesRon 10's light cruiser YAHAGI with DesDiv 17's URAKAZE, ISOKAZE, HAMAKAZE and the YUKIKAZE and Group "A"'s YAMATO and MUSASHI, CruDiv 4's ATAGO, TAKAO, MAYA and CHOKAI, DesRon 2's light cruiser NOSHIRO with DesDiv 27's AKISHIMO and HAYASHIO, DesDiv 31's KISHINAMI, OKINAMI and ASASHIMO, DesDiv 32's FUJINAMI, HAMANAMI and SHIMAKAZE, DesDiv 17's HAMAKAZE, DesDiv 27's SHIGURE and SAMIDARE. Carries Imperial Army troops and material to Nakagusuku Bay, Okinawa.
12 July 1944:
Group B departs Okinawa.
14 July 1944:
Arrives at Manila.
17 July 1944:
19 July 1944:
Arrives at Singapore, then to Lingga.
22 September 1944:
Lingga anchorage. TONE receives fresh provisions replenishment from stores ship KITAKAMI MARU.
1 October 1944:
Lingga anchorage. TONE receives fresh provisions replenishment from stores ship KITAKAMI MARU.
5 October 1944:
Lingga anchorage. TONE receives fresh provisions replenishment from KITAKAMI MARU.
18-20 October 1944:
Departs Lingga with the fleet for Brunei, Borneo.
22 October 1944: Operation "SHO-I-GO"(Victory) - The Battle of Leyte Gulf:
Vice Admiral Kurita Takao's (former CO of KONGO) First Mobile Striking Force (Center Force) sorties from Brunei. Vice Admiral Shiraishi's CruDiv 7's TONE CHIKUMA, KUMANO and SUZUYA are in Force "A"'s Second Section with BatDiv 3's KONGO and HARUNA, DesRon 10's light cruiser YAHAGI and destroyers NOWAKI, URAKAZE, YUKIKAZE, HAMAKAZE and ISOKAZE. The Second Section follows Force "A"'s First Section BatDiv 1's YAMATO, MUSASHI and NAGATO, CruDiv 4's ATAGO, TAKAO, MAYA and CHOKAI, CruDiv 5's MYOKO and HAGURO, DesRon 2's flagship light cruiser NOSHIRO and DesDiv 2's HAYASHIMO, AKISHIMO, KIYOSHIMO, DesDiv 31's KISHINAMI, OKINAMI, ASASHIMO and DesDiv 32's FUJINAMI, NAGANAMI, HAMANAMI and destroyer SHIMAKAZE..
All the ships in Kurita's Striking Force, except those of BatDiv 1, send their floatplanes to San Jose on Mindoro Island as a precaution against fires in battle. ASW patrols are to be conducted by the 901st Kokutai, but this proves fatal for three of Kurita's cruisers.
23 October 1944: The Battle of the Palawan Passage:
At 0633, Force A is attacked by Cdr (later Captain) David McClintock's USS DARTER (SS-227) and LtCdr (later Captain) Bladen Clagett's USS DACE (SS-247). Vice Admiral Kurita's flagship ATAGO and MAYA are sunk and TAKAO damaged. Kurita is picked up by destroyer KISHINAMI, but it is not until 1620, that he transfers to YAMATO and resumes command of Force A from Vice Admiral Ugaki.
24 October 1944: The Battle of the Sibuyan Sea:
Force A endures eleven raids by over 250 Task Force 38 carrier aircraft from USS ESSEX (CV-9), LEXINGTON (CV-16), INTREPID (CV-11), CABOT, (CVL-28), FRANKLIN (CV-13), ENTERPRISE (CV-6). The battleship MUSASHI is sunk, bombs hit YAMATO and NAGATO. HARUNA is damaged by near misses. Bombs hit TONE and MYOKO.
At 1530 hours, Force A reverses course back through the Sibuyan Sea. At 1715 hours, Kurita again reverses course. At 2330 hours, Force A enters the San Bernadino Strait in single file.
25 October 1944: The Battle off Samar:
At 0030, Force A exits the San Bernardino Strait and proceeds towards Leyte Gulf.
At 0544, Force A's lookouts spot four enemy destroyers, and shortly thereafter three carriers, three cruisers and two more destroyers at a range of 23 miles bearing 60 degrees to port.
At 0558 Force A opens fire at the "jeep" escort carriers of "Taffy 3": USS ST. LO (CVE-63), WHITE PLAINS (CVE-66), KALININ BAY (CVE-68), FANSHAW BAY (CVE-70) (F), KITKUN BAY (CVE-71) and GAMBIER BAY (CVE-73). "Taffy 3"'s carriers are screened by destroyers HOEL (DD-533), JOHNSTON (DD-557), HEERMANN (DD-532) and destroyer escorts JOHN C. BUTLER (DE-339), RAYMOND (DE-341), DENNIS (DE-405) and SAMUEL B. ROBERTS (DE-413).
At 0654, HEERMANN fires three torpedoes at HARUNA. These torpedoes miss HARUNA but cause the YAMATO and NAGATO to turn northward and steam for 10 miles until the torpedoes run out of fuel.
Between 0755 and 0910, Force "A" sinks GAMBIER BAY, HOEL, ROBERTS and JOHNSTON.
At 0825, Kurita orders all ships to head north, but at 1020 he reverses course southward and again heads towards Leyte Gulf.
Between 1030 and 1320, CHOKAI, CHIKUMA and SUZUYA are disabled by battle damage and subsequently lost. Force A reverses course northward and at 2100 retires through the San Bernardino Strait.
26 October 1944:
Aircraft attack Force A in the Tablas Strait off Panay Island. TONE is not further damaged.
27 October 1944:
28 October 1944:
The remnants of Force A arrive at Brunei Bay, Borneo and refuel.
6 November 1944:
Carrier JUNYO and light cruiser KISO, escorted by DesDiv 30's YUZUKI and UZUKI arrive at Brunei from Sasebo with ammunition resupply for Kurita's force.
8 November 1944:
12 November 1944:
TONE, JUNYO, ASHIGARA, KISO and DesDiv 30 depart Brunei towards Pratas Islands (near the Formosa Strait) following Bat Div 1's YAMATO, NAGATO, BatDiv 3's KONGO and HARUNA, light cruiser YAHAGI and DesDiv 17's four destroyers. TONE, JUNYO, KISO and DesDiv 30 are detached to Manila. The remainder of the YAMATO group returns to Brunei. TONE, JUNYO, DesDiv 30 and destroyer SHIGURE depart Manila the same day for Mako, Pescadores.
At 1132, USS GUNNEL (SS-253) sights the upper works of a ship bearing 240°(T), range 31, 000 yards at 17-13 N, 116-26 E. GUNNEL tracks the target with her high periscope. At 1256, the JUNYO group is on course 020°(T), making 19 knots. GUNNEL identifies one ship as a TONE-class cruiser, but misidentifies JUNYO as a "YAMATO-class battleship". The seas pick up to condition 3 from ahead. The JUNYO group draws away from the pursuing submarine at 19 knots on base course 028°(T). GUNNEL, at 17 knots maximum speed, cannot close.
At 1600, GUNNEL loses sight of the targets at 35,000 yards in a rain squall. At 2130, GUNNEL gives up the chase. The JUNYO group arrives at Mako later that night.
13 November 1944:
JUNYO, TONE, Desdiv 30 and destroyer SHIGURE depart Mako for Kure.
14 November 1944:
East China Sea. USS JALLAO (SS-368) attacks JUNYO but misses with six bow torpedoes.
15 November 1944:
East China Sea. JUNYO is attacked unsuccessfully by USS BARB (SS-220). She misses with five torpedoes. JUNYO is chased unsuccessfully by BARB, QUEENFISH (SS-393), PETO (SS-265), and SUNFISH (SS-281). Near Kure, TONE is detached with SHIGURE.
16 November 1944:
Near Saesbo. TONE is detached from SHIGURE.
17 November 1944:
Arrives at Maizuru. Drydocked. Four additional triple mount 25-mm AA guns are installed aft and seven single mount 25-mm AA guns are removed bringing TONE's total 25-mm AA suite to 62 barrels (12x3, 4x2, 18x1). TONE's Type 21 radar is relaced with a Type 22.
21 November 1944:
CruDiv 7 is disbanded. TONE is assigned to the Second Fleet's CruDiv 5 with KUMANO.
18 February 1945:
Repairs are completed. Departs Maizuru.
20 February 1945:
Arrives at Kure.
20 February 1945:
Moored near Eta Jima. Used as a Naval Academy training ship.
19 March 1945:
Vice Admiral (later Admiral) Marc A. Mitscher's (former CO of HORNET, CV-8) Task Force 58 raids Kure. The TONE is damaged slightly.
24 July 1945:The Final Destruction of the Imperial Japanese Navy:
The TONE is attacked by nine aircraft of Vice Admiral (later Admiral) John S. McCain's (former CO of RANGER, CV-4) Task Force 38 from MONTEREY (CVL 26) and hit by three bombs. She settles in shallow water on the bottom of Hiroshima Bay W of Kure at Nishinomi Shima.
At 1942, USN codebreakers intercept and decrypt a message from TONE that reads: “Action Summary. Engaged by about 50 Curtiss and Grumman planes each during two attacks. Damage incurred: took two direct hits of one bomb of about 250 (pounds?) and 1 small bomb and several near misses. Crack in --- hold damaging No. 2, No. 3, and No.4 ---- and flooding main control board room. No.4 turret, 1 AA gun, 6 4-gun machine gun mounts, 4 2-gun machine gun mounts. 2 3-gun machine gun mounts, ---, and No. 4 -- destroyed. Generators, with the exception of No. 1 ---generator (200 kilowatts) cannot be used. ---boiler installations destroyed and cannot be used. Personnel killed, lost and wounded (number of officers in parentheses). 59(5), 28(1), 127(0) --.”
28 July 1945:
TONE's hulk is attacked by Task Force 38 planes from USS WASP (CV-18) Air Group 86 and TICONDEROGA's (CV-14) Air Group 87. The hulk is hit by aircraft rockets and 1, 000-lb semi-armor piercing bombs from Grumman SB2C "Helldiver" dive-bombers.
20 November 1945:
Removed from the Navy List.
Scrapped at Kure.
 Mt. Niitaka, located in Formosa (now Taiwan), was then the highest point in the Japanese Empire.
 On 1 March 1942, planes from carriers AKAGI, KAGA, HIRYU and SORYU launched strikes that sank PECOS. WHIPPLE rescued 232 survivors and took them to safety in Australia.
 Don Kehn, Jr's book "A Blue Sea of Blood" cites Japanese records that indicate SORYU's Vals were not led by LtCdr (Captain, posthumously) Egusa Takashige as alleged in many other works.
 Different numbers have been published for the survivors from USS EDSALL. BatDiv 3/2's combat diary suggests seven sailors were rescued.
 Postwar in Hong Kong, Sakonjo is executed as a war criminal by the British.
Thanks for assistance in researching the IJN officers mentioned in this TROM go to Mr. Jean-François Masson of Canada. Special thanks and credit goes to Andrew Obluski of Poland for providing details concerning TONE's floatplane
operations during her wartime career. Thanks also go to Aldert Gritter ("Adm. Gurita") of the Netherlands and Randy Stone of the United States and to John Whitman of the USA for info on CNO intercepts of Japanese messages and to Don
Kehn, Jr. of Texas.
Thanks also go to Gilbert Casse for info in Rev 15 and Don Kehn, Jr for aircraft info in Rev 18. Thanks also go to the late John Whitman and to Gengoro Toda of Japan for info about stores ship KITAKAMI MARU.
Thanks also go to Rob Stuart of Canada for additional info about "Operation C". For more info on "Operation C" please see Rob's splendid 20 Ships, Not 23: Ozawa’s Score, 5-6 April 1942.
- Bob Hackett and Sander Kingsepp.