© 2007-2016 Bob Hackett, Sander Kingsepp and Peter Cundall
20 October 1943:
Nagasaki. CD-10 is laid down at Mitsubishi Heavy Industries’ shipyard.
11 January 1944:
Launched and numbered CD-10.
29 February 1944:
Completed and registered in the IJN. Attached to Sasebo Naval District. Assigned to Sasebo Guard Force.
25 March 1944:
Assigned to the General Escort Command’s First Surface Escort Division.
27 March 1944:
At 0700 CD-8, CD-9 and CD-10 depart Saeki. At 1400 CD-8 and CD-9 arrives at Moji (CD-10 goes to Kure).
28 March 1944:
At 1500 CD-10 arrives at Kure. Docked for repairs.
8 April 1944:
At 0800 departs Kure and at 1820 arrives at Moji.
20 April 1944:
At 0600, CD-10 departs Moji-Mutsure for Singapore with kaibokan KURAHASHI, CD-11 and CD-20 escorting convoy HI-59 consisting of tankers OKIKAWA, NIPPPO, EIHO, OTORISAN, MANEI, TENEI and NIYO MARUs, NICHINAN MARU No.2 and transports MANKO, TEIHOKU (Ex French PERSEE) and AOBASAN MARUs.
26 April 1944:
NIYO MARU suffers an engine breakdown and is towed by MANKO MARU to Woosung (near Shanghai) with CD-11 as escort.
28 April 1944:
At 1410 HI-59 arrives at Takao.
29 April 1944:
At 0920 HI-59 departs Takao.
2 May 1944:
At 1200, HI-59 arrives at Manila and is dissolved.
5 May 1944:
At 1800 CD-10 and CD-11 depart Manila escorting Rinji Convoy.
7 May 1944:
CD-11 separates from the convoy.
10 May 1944:
At 0700 arrives at Balikpapan.
11 May 1944:
At 0200 CD-10 departs Balikpapan alone.
12 May 1944:
At 1630 arrives at Tarakan.
16 May 1944:
At 1210 departs Tarakan with Combined Fleet taskforce.
18 May 1944:
At 2000 arrives at Manila.
12 June 1944:
At 0800, CD-10 departs Manila for Wasili harbor, Halmahera Island with submarine chaser CH-45 and patrol boats PB-103 and PB-105 escorting convoy H-29 consisting of MACASSAR, JUNPO, YAMAGIKU, FRANCE, KURAMASAN, HIBI and TAIYU MARUs.
17 June 1944:
HIBI MARU is detached for Zamboanga, Mindanao.
23 June 1944:
At 1710, convoy H-29 arrives at Halmahera Island.
25 June 1944:
At 0550, CD-10 departs Wasili harbor, Halmahera Island for Manila with patrol boats PB-103 and PB-105 escorting convoy M-25 consisting of MACASSAR, JUNPO, YAMAGIKU, FRANCE and TAIYU MARUs.
28 June 1944:
Moro Gulf, 35 miles east of Zamboanga, Philippines. At 0712, LtCdr Ian C. Eddy’s (USNA ’30) USS PARGO (SS-264) attacks the convoy. Eddy torpedoes and sinks YAMAGIKU MARU, with the loss of three crewmen, and damages CD-10 at 06-50N, 121-30E.
29 June 1944:
At 1550, the convoy departs Zamboanga with KASAGISAN MARU as an additional member.
1 July 1944:
Cebu Sea. FRANCE and TAIYU MARUs are detached.
3 July 1944:
The remainder of convoy M-25 arrives at Manila.
21 July 1944:
CD-10 joins convoy YUTA-09 near North San Fernando, Luzon. The convoy by this time consists of TATSUWA, PACIFIC, MACASSAR, MURORAN and JUNPO MARUs and two unidentified merchant ships escorted by destroyer KURETAKE and auxiliary gunboat PEKING MARU. After leaving port at 2255 in position 17-31N 120-22E PEKING MARU runs aground and is left behind.At some unknown date because of submarine fears the convoy is ordered to return to North San Fernando.
24 July 1944:
At North San Fernando HAKOZAKI MARU is coaled from TATSUWA MARU.
26 July 1944:
Together with MATA-25 convoy the ships departs North San Fernando. MATA-25 consists of HAKOZAKI, SEIGA, SHINFUKU MARUs, NISSHO MARU No. 18 and two unidentified merchant ships and is escorted by subchaser CH-48, auxiliary netlayer KISHIN MARU, auxiliary subchaser SHONAN MARU No. 8 and one unidentified warship.
28 July 1944:
At 1545 arrives at Takao.
31 July 1944:
CD-10, destroyer SHIOKAZE, minelayer YURIJIMA and sub-chaser CH-48 depart Takao in convoy TAMO-22 consisting of TATSUWA MARU and six unidentified merchant ships.
1 August 1944:
At 1300 arrives at Kirun.
4 August 1944:
At 1200 departs Kirun.
8 August 1944:
At 1030 CD-10 arrives at Sasebo, after being detached. Enters drydock for repairs. Later that day the convoy arrives at Moji.
15 August 1944:
At 0600, CD-10 departs Moji for Takao with destroyer HATSUSHIMO, kaibokan CD-20, torpedo boat HIYODORI, minesweeper W-20 and subchaser CH-63 escorting convoy MOTA-23 consisting of FUKUREI, EDOGAWA, TAIJO, EIJI, MANSHU, ATSUTA, CHINA, ROZAN, EIMAN, TOYOOKA, KOGYO, AWAJI MARUs, YOSHIDA MARU No. 3, TOYO MARU No. 3 and an unidentified ship.
18 August 1944:
At 1900 arrives at Kagoshima.
20 August 1944:
At 0200 departs Kagoshima.
24 August 1944:
At about 0700, LtCdr Henry S. Monroe's (USNA ’33) USS RONQUIL (SS-396) torpedoes and sinks YOSHIDA MARU No. 3 with 70 crewmen, 10 gunners and 96 of 99 soldiers KIA. At about the same time, Monroe torpedoes and damages FUKUREI MARU. She floods and drifts ashore where she is abandoned about three months later.
25 August 1944:
At 1400, the convoy arrives at Kirun (Keelung).
27 August 1944:
At 0900 the convoy departs Kirun.
28 August 1944:
At 1900 arrives at Takao.
30 August 1944:
At 1500, CD-10 departs Takao for Manila with minelayer SHIRATAKA, minesweeper W-21, and kaibokan CD-20 escorting reorganized convoy MI-15 that now consists of RIKKO, TAISHO, OKUNI (TAIKOKU), EIKYU, SHINYO, NANSEI, HOSEN and CHIYODA MARUs with UNKAI MARU No. 5, OKINOYAMA MARU No. 5 and KYOEI MARU No. 10.
31 August 1944:
Luzon Strait, S of Formosa. At about 0220, LtCdr (later Rear Admiral) Charles E. Loughlin's (USNA ’33) USS QUEENFISH (SS-393) hits CHIYODA MARU with four torpedoes and sets her afire. At 0240, as the moon sets, CHIYODA MARU sinks. She was carrying 430 passengers, coal briquettes and drummed gasoline. 15 crewmen and 382 soldiers are KIA. Loughlin also damages oiler RIKKO MARU steaming in ballast.
LtCdr (later Vice Admiral) Eli T. Reich's (USNA ’35) USS SEALION (SS-315), a member of "Ben's Busters" with USS GROWLER (SS-215) and USS PAMPANITO, enters the Bashi Strait. USS SEALION’s SJ radar picks up the convoy and Reich makes a night surface approach. He sets up and fires six torpedoes, but they all run erratically. About 0500, Reich swings SEALION and fires his four stern torpedoes at a large tanker. He claims two hits.
Alerted by code-breaker's "Ultra" signals, LtCdr (later Rear Admiral) Eugene B. Fluckey's (USNA ’35) USS BARB (SS-220) intercepts the convoy. At about 0700, Fluckey torpedoes OKUNI MARU. She sinks stern first taking down three of her crew. Fluckey also sinks the 45th Minesweeper Squadron's HINODE MARU No. 20 that was patrolling the area. Two crewmen are KIA.
USS SEALION evades the convoy's escorts. Still surfaced, LtCdr Reich makes an “end-around” approach and works his way ahead of the convoy. At 0715 (JST), SHIRATAKA's lookouts spot a submarine on the surface at at 21-05N, 121-26E. Reich misidentifies SHIRATAKA as a destroyer. He begins a submerged approach. At 0730, Reich hits SHIRATAKA with two of three torpedoes. At 1115, SHIRATAKA sinks at 20-55N, 121-07E. Captain Miki Takahide (46) is KIA. He is promoted Rear Admiral, posthumously.
1 September 1944:
CD-10 arrives at Tungchiang, southern Formosa.
2 September 1944:
At 2200 CD-10 departs Tungchiang and engages in a submarine hunt, before rejoining the convoy.
5 September 1944:
At 1900 arrives at San Fernando.
6 September 1944:
Departs San Fernando.
7 September 1944:
At 1000, the convoy arrives at Manila.
10 September 1944:
CD-10 departs Manila for Moji with CD-20 and minesweeper W-21 escorting fleet convoy MAMO-03 consisting of GOKOKU, KAGU and KIBITSU MARUs.
11 September 1944:
S China Sea. 100 miles NE of the Paracel Islands. Convoy MAMO-03 joins fleet convoy HI-72 that departed Singapore on 6 September for Moji. HI-72 includes ASAKA, NANKAI, KIMIKAWA, RAKUYO, ZUIHO, KIBITSU and KACHIDOKI MARUs (ex-PRESIDENT HARRISON). HI-72 carries oil, drummed aviation gasoline, bauxite, mercury and rubber. RAKUYO MARU also carries 1,317 Allied POWs and KACHIDOKI MARU carries another 950 POWs. Destroyer SHIKINAMI and kaibokan HIRADO, MIKURA and KURAHASHI are in the escort.
12 September 1944:
At 0200, HIRADO is torpedoed by Cdr Thomas B. Oakey’s (USNA ’34) USS GROWLER (SS-215). The kaibokan blows up and sinks. Rear Admiral Kajioka Sadamichi (39) (former CO of KISO), victor of Wake Island, now CO of the 6th Escort Convoy Command is killed. He is promoted Vice Admiral, posthumously.
At 0500, RAKUYO MARU is torpedoed by LtCdr (later Vice Admiral) Eli T. Reich's (USNA ’35) USS SEALION and hit in the No. 1 hold and engine room. RAKUYO MARU is carrying 1,318 POWs (601 British, 716 Australian and several US POWs) of whom 1,051 POWs and nine crewmen are KIA. About the same time, USS SEALION also torpedoes NANKAI MARU carrying 525 passengers, 6,500-tons of bauxite, 4,000 drums of gasoline, 170-tons of oil, 77 mail packages and ashes of 18 war dead. She is hit in Hold Nos. 3 and 6 and sinks about 0800. 196 passengers and 3 crewmen are KIA. 
240 miles south of Hong Kong. Just before 0700, SHIKINAMI is torpedoed by USS GROWLER and sinks at 18-16 N, 114-40 E. Eight officers and 120 men rescued by the MIKURA. At 2300, KACHIDOKI MARU carrying 487 IJA troops, 608 patients, gunners, ashes of 582 dead, 950 POWs and a cargo of 6,000-tons of bauxite, is hit by USS PAMPANITO (SS-383) and sinks. 431 POWs perish as well as 45 other passengers and 12 crewmen. USS PAMPANITO also sinks ZUIHO MARU loaded with 8,000-tons of oil products, with no casualties. The Japanese rescue a few POWs from the two prison ships. The survivors are transferred to KIBITSU MARU and taken to Japan. 
15 September 1944:
At 1030 the remainder of the convoy arrives at Yulin, Hainan Island.
16 September 1944:
At 2000 CD-10 departs Yulin for Moji with kaibokan MIKURA, ETOROFU, CD-18 and CD-26 escorting the first echelon of reorganized convoy HI-72 consisting of ASAMA, KIBITSU MARU, GOKOKU and KAGU MARUs.
20 September 1944:
Off Formosa. At 0110, USAAF B-24 "Liberator" heavy bombers attack the convoy’s first echelon (Moji-bound) at 23-20N, 119-12E. GOKOKU MARU is damaged by a direct hit and ASAMA MARU suffers a near miss aft. Both are towed into nearby Mako for repairs. KAGU MARU suffers hull damage by near-misses. Kaibokan MIKURA is damaged and towed to Mako by CD-18. The bombers also damage cargo vessels ASAKA and SHINCHO MARUs. KAGU MARU heads for Kirun (Takao in some sources) for repairs escorted by CD-10, CD-11 and CD-20.
21 September 1944:
At 1915 CD-10 arrives at Kirun. CD-11 follows at 2400.
23 September 1944:
At 1200 CD-10, CD-20 and CD-11 depart Kirun to meet incoming elements of HI-72 convoy.
24 September 1944:
At 1045 they meet up with KIBITSU MARU and arrive at Kirun at 1320.
25 September 1944:
At 1300, CD-10 departs Kirun for Moji with kaibokan CD-11 and CD-20 escorting KIBITSU and KAGU MARUs.
27 September 1944:
East China Sea, 100 miles NNW of Amami-O-Shima. LtCdr Clyde B. Stevens Jr's (USNA ’30) USS PLAICE (SS-390) torpedoes and sinks CD-10 at 29-26N, 128-50E. CD-11 rescues eight crewmen, but 148 of CD-10's crewmen are lost.
11 October 1944:
Removed from the Navy List.
 The Japanese rescue some of the POWs from these two ships. All are transferred to KIBITSU MARU and taken to Japan. The American submarines later return to rescue a number of British and Australian POWs.
Thanks to Mr. Gilbert Casse of France.
-Bob Hackett, Sander Kingsepp and Peter Cundall.