IJN Submarine RO-36:
Tabular Record of Movement

2001-2017 Bob Hackett & Sander Kingsepp
Revision 2

7 March 1942:
Laid down at Mitsubishi's Kobe Yard as a 960-ton type K6 submarine.

25 September 1942:
Numbered RO-36 and provisionally attached to Maizuru Naval District.

14 October 1942:
Launched as RO-36.

16 March 1943:
Lt (promoted LtCdr 1 November) Okada Hideo (61)(former CO of RO-58) is appointed the Chief Equipping Officer (CEO).

27 May 1943:
Kobe. RO-36 is completed, commissioned in the IJN and attached to Maizuru Naval District. Lt Okada Hideo is the Commanding Officer.

31 May 1943:
Reassigned to SubRon 11 for working-up.

20 August 1943:
Reassigned directly to the Sixth Fleet.

5 September 1943:
Departs Maizuru for Truk.

24 September 1943:
Departs Truk for the New Hebrides area on her first war patrol.

13 October 1943:
Off New Hebrides. RO-36 attacks a lone merchant, but fails to hit her. That same day, 40 crewmembers come down with food poisoning.

14 October 1943:
RO-36 is ordered to return to base.

21 October 1943:
Returns to Truk.

31 October 1943:
Reassigned to SubDiv 34.

4 December 1943:
HEIAN MARU transfers torpedoes to RO-36.

6 December 1943:
HEIAN MARU transfers supplies to RO-36.

8 December 1943:
HEIAN MARU transfers supplies to RO-36 and I-36. RO-36 departs Truk to reconnoiter Espiritu Santo on her second war patrol.

8 January 1944:
Returns to Truk.

19 January 1944:
Truk. HEIAN MARU transfers torpedoes to RO-36 and I-180.

31 January 1942:
HEIAN MARU transfers torpedoes to RO-36 and RO -40.

31 January 1944: American Operation "FLINTLOCK" - The Invasion of the Marshalls:
Vice Admiral (later Admiral) Marc A. Mitscher's (USNA '10) Task Force 58 lands the 4th Marine Division and the Army's 7th Infantry Division that capture the Kwajalein, Roi-Namur and Majuro atolls.

Truk. That same day, HEIAN MARU transfers torpedoes to RO-36 and RO-40.

25 January 1944:
Truk. HEIAN MARU transfers stores to RO-36 and I-169.

1 February 1944:
Lt (LtCdr, posthumously) Kawashima Tatsuo (64)(former torpedo officer of I-31) is appointed the CO.

17 to 19 February 1944:
TF 58 raids Truk. RO-36, I-10 and RO-42 attempt to intercept the attackers.

25 February 1944:
Departs Truk to patrol in the Marshalls on her third war patrol.

1 March 1944:
RO-36 is redirected to reconnoiter Roi Island.

4 March 1944:
After sunset, RO-36 surfaces off Roi, but fails to detect any enemy forces.

15 March 1944:
RO-36 is redirected to an area 60 miles E of Kwajalein and then to Pingelap Atoll to rescue Japanese coastwatchers.

23 March 1944:
Pingelap Atoll. RO-36 embarks the coastwatchers and departs for Truk.

28 March 1944:
Returns to Truk.

15 April 1944:
Departs Truk for Maizuru.

22 April 1944: American Operations "PERSECUTION" and "RECKLESS" - The Landings on New Guinea:
Rear Admiral (later Vice Admiral) Daniel E. Barbey's (USNA '12) Task Force 77 lands the 41st and 24th Infantry divisions of Lt Gen (later General) Robert L. Eichelberger's I Corps at Aitape and Tanahmerah Bay (PERSECUTION) and at Humboldt Bay, Hollandia, New Guinea (RECKLESS).

26 April 1944:
The RO-36 returns to Maizuru for an overhaul. While in port, LtCdr Kawashima Tatsuo assumes command.

4 June 1944:
Departs Maizuru via Saeki, Kyushu on a supply run to Wewak, New Guinea.

11 June 1944:
Departs Saipan on her fourth war patrol to patrol off northern coast of New Guinea

13 June 1944: Operation "A-GO" - The Defense of the Marianas:
Tokyo. The CINC, Combined Fleet, Admiral Toyoda Soemu (33)(former CO of HYUGA), activates A-GO and orders Vice Admiral Takagi Takeo (39)(former CO of MUTSU), CINC, Sixth Fleet (Submarines) to redeploy his boats to the Marianas. From his Headquarters on Saipan, Takagi orders all available submarines to deploy E of the Marianas.

After the Japanese detect the presence of an American Task Force off the Marianas, RO-36 is redirected to the Saipan area with RO-43 and reassigned to SubRon 7 at Truk.

The RO-36 sends a regular situation and weather report that day to ComSubRon 7. It is the last report received from RO-36.

75 miles E of Saipan. Cdr (later Captain) Warner R. Edsall's (later CO of USS MISSOURI-BB-63) USS MELVIN (DD-680) is part of the screen of Task Group 52.17's battleships approaching to bombard Saipan. About midnight, MELVIN's radar detects a surfaced submarine. Cdr Edsall closes and opens fire with his 5-inch main armament. MELVIN sinks the submarine - probably the RO-36 - with depth charges at 15-21N, 147-00E.

12 July 1944:
Presumed lost with all 77 hands N of New Guinea.

10 August 1944:
Removed from the Navy List.

Author's Note:
Thanks go to Dr. Higuchi Tatsuhiro of Japan.

Bob Hackett and Sander Kingsepp.

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