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Japanese Submarine Casualties in World War Two
(I and RO Boats)

Date Submarine Cause of Sinking Position
1941  
10 Dec I-70* (Sano) VB-6 Aircraft from Enterprise (CV-6) 23-45 N, 155-35 W
17 Dec RO-66 (Kurokawa) Collision with RO-62 19-25 N, 166-30 E
29 Dec RO-60 (Takizawa) Wrecked on reef Kwajalein
1942  
17 Jan I-60* (Hasegawa) HMS Jupiter 06-00 S, 105-00 E
20 Jan I-124 (Kishigami) Edsall (DD-219), HMAS Deloraine Lithgow & Katoomba 12-24 S, 129-49 E
27 Jan I-73* (Isobe) Gudgeon (SS-211) 28-24 N, 178-35 E
26 Feb? I-23 (Shibata) Probable marine casualty Last reptd. S of Oahu, 14 Feb.
1 Apr RO-30 Stricken as over-age
1 Apr RO-32

-do-

17 May I-28 (Yajima) Tautog (SS-199) 06-30 N, 152-00 E
17 May I-64 (Niina) Triton (SS-201) 29-25 N, 134-09 E
28 Aug I-123 (Nakai) Gamble (DD-123) 09-21 S, 160-43 E
29 Aug RO-33 (Kuriyama) HMAS Arunta 09-36 S, 147-06 E
31 Aug RO-61 (Tokutomi) VP-42, VP-43 & Reid (DD-369) 52-36 N, 173-57 W
28 Sep
(4 Nov?)
RO-65** (Egi) Foundered (while submerged) during USAAF attack Kiska Harbor
13 Oct I-30 (Endo) Mined off Singapore 01-00 N, 105-00 E
2 Nov I-15 (Ishikawa) McCalla (DD-488) 10-53 S, 161-50 E
11 Nov I-172 (Ota) Southard (DMS-10) 10-13 S, 161-09 E
9 Dec I-3 (Togami) PT-59 09-13 S, 159-40 E
25 Dec I-4 (Ueno) Seadragon (SS-194) 05-02 S, 152-53 E
25 (4 Nov) Dec I-22§ (Naruzawa) Probable marine casualty Near Indispensable Str.
1943  
29 Jan I-1 (Sakamoto) HMNZS Kiwi &, Moa 09-13 S, 159-37 E
11 Feb I-18 (Muraoka) Fletcher (DD-445) & Aircraft from Helena (CL-50) 14-15 S, 161-59 E
7 Apr RO-34 (Tomita) Strong (DD-467) 10-05 S, 162-08 E
12 May I-31 (Inoue) Edwards (DD-265) & Farragut (DD-348) Off Attu or Kiska
14 May RO-102 (Kanemoto) PT-150 & PT-152 06-55 S, 147-34 E
29 May I-178 (Uts'ki) SC-669 15-35 S, 167-17 E
11 Jun I-9 (Fujii) Frazier (DD-607) 52-49 N,177-38 E
11 Jun I-24 (Hanabusa) PC-487 53-16 N, 174-24 E
22 Jun I-7 (Nagai) Monaghan (DD-354) 51-55 N,177-36 E
12 Jul RO-107 (Egi) Taylor (DD-468) 08-00 S, 157-19 E
14 Jul I-179 (Yuasa) Sunk in accident Inland Sea (lyo Bay)
27 Jul I-168 (Nakajima) Scamp (SS-277) 02-50 S, 149-01 E
28 Jul RO-103 (Ichimura) Uncertain; probably mined 08-06 S, 156-57 E
19 Aug I-17 (Harada) VS-57 & HMNZS Tui 23-26 S, 166-50 E
25 Aug RO-35 (Manabe) Ellet (DD-398) 13-10 S, 165-28 E
1 Sep I-182 (Yonehara) Wadsworth (DD-516) 15-56 N, 167-04 E
3 Sep I-25 (Obiga) Patterson (DD-392) 12-57 S, 164-23 E
15 Sep RO-101 (Fujisawa) Saufley (DD-465) & VP-23 10-57 S, 163-56 E
10 Oct I-20 (Ots'ka) Eaton (DD-510) ? (more likely marine casualty) 07-40 S, 157-10 E

*Sometimes incorrectly referred to as I-170, etc.; I-53 to -75 were not renamed I-153 to -175 until 20 May 1942. -Imperial Japanese Navy in World War II, p. 68.

**Possibly lost 28 Sep.--U.S. Strategic Bombing Survey, 1946; Campaigns of the Pacific War, p. 93.

§Giving the locale as "off the mouth of the Kumusi River, 15 miles beyond Buna," and the date as the previous night, the PT monograph comments, "Immediately after the war, PT-122 was given official credit for sinking in this attack I-22, a submarine of 2,180 standard tons. More recent investigations, however, have thrown doubt on this assessment. The object of the 122's attack and the degree of damage inflicted must still be considered uncertain." -- At Close Quarters, Robert J. Bulkley, pp. 173-74 (GPO, 1963).

--175--

Date Submarine Cause of Sinking Position
18 Oct I-19 (Kobayashi) Possibly VB-104 04-57 N, 163-03 E
13 Nov I-34 (Irie) HM Sub. Taurus 05-17 N, 100-05 E
22 Nov I-35 (Yamamoto) Frazier (DD-607) & Meade (DD-602) 01-22 N, 172-47 E
24 Nov RO-38 (Nomura) Cotten (DD-669) (uncertain) 01-23 N, 173-16 E
25 Nov? RO-100 (Ogane) US Army Aircraft ? 2 mi. W of Omai, vic. Buin
25 Nov I-40 (Watanabe) Radford (DD-446) 03-10 N, 171-55 E
26 Nov I-39 (Tanaka) Boyd (DD-544) 00-31 N, 172-16 E
29 Nov I-21 (Inada) VC-35 Aircraft from Chenango (CVE-28) 00-05 N, 173-42 E
1944  
11 Jan I-11 (Izu) Probable marine casualty Ellice Is.
16 Jan I-181 (Taoka) Surface or Aircraft, St. George's Channel Solomon Is.
22 Jan RO-37 (Sato) Buchanan (DD-484) 11-47 S, 164-17 E
1 Feb I-175 (Tabata) Walker (DD-517) 09-24 N, 170-32 E
3 Feb I-171 (Shimada) Probable marine casualty Rabaul to Buka
5 Feb RO-39 (Tategami) Charrette (DD-581) & Fair (DE-35) 06-48 N, 168-08 E
11 Feb RO-110 (Ebato) HMIS Jumna, HMAS Launceston & Ipswich 17-25 N, 83-21 E
12 Feb I-27 (Fukumura) HMS Paladin &. Petard 01-25 N, 72-22 E
15 Feb I-43 (Endo) Aspro (SS-309) 12-42 N, 149-17 E
15 Feb RO-40 (Kido) Phelps (DD-360) & Sage (AM-111) 09-50 N, 166-35 E
23 Mar I-42 (Ogawa) Tunny (SS-282) 06-40 N, 134-03 E
24 Mar I-32 (Inamoto) Manlove (DE-36) & PC-1135 08-30 N, 170-10 E
3 Apr I-174 (Suzuki) Probable marine casualty Inland Sea to Truk
4 Apr I-169 (Shinohara) Foundered at Truk during Aircraft attack 07-25 N, 151-50 E
6 Apr I-2 (Yamaguchi) Saufley (DD-465) 02-17 S, 149-14 E
26 Apr I-180 (Fujita) Gilmore (DE-18) 55-10 N, 155-40 W
28 Apr I-183 (Saeki) Pogy (SS-266) 32-07 N, 133-03 E
30 Apr RO-45 (Kawashima) MacDonough (DD-351), Stephen Potter (DD-538) & VF-28 Aircraft from Monterey (CVL-26) 06-13 N, 151-19 E
13 May RO-501 (Norita) (ex-U-1224) Francis M. Robinson (DE-220) 18-08 N, 33-13 W
16 May I-176 (Okada) Haggard (DD-555), Franks (DD-554) & Johnston (DD-557) 04-01 S, 156-29 E
19 May I-16 (Takeuchi) England (DE-635) 05-10 S, 158-17 E
22 May RO-106 (Uda) England (DE-635) 01-40 N, 150-31 E
23 May RO-104 (Izubuchi) England (DE-635) 01-26 N, 149-20 E
23 May RO-116 (Okabe) England (DE-635) 00-53 N, 149-14 E
26 May RO-108 (Obari) England (DE-635) 00-32 S, 148-35 E
31 May RO-105 (Inoue) England (DE-635) & George (DE-697), Raby (DE-698), Hazelwood (DD-531) & McCord (DD-534) 00-47 N, 149-56 E
10 Jun RO-42 (Kudo) Bangust (DE- 739) 10-05 N, 168-22 E
11 Jun RO-111 (Nakamura) Taylor (DD-468) 00-26 N, 149-16 E
13 Jun I-33 (Wada) Sunk in training accident 33-30 N, 132-30 E
13 Jun RO-36 (Kawashima) Melvin (DD-680) 15-21 N, 147-00 E
16 Jun RO-44 (Uesugi) Burden R. Hastings (DE-19) 11-13 N, 164-15 E
17 Jun RO-114 (Ata) Wadleigh (DD-689) & Melvin (DD-680) 15-02 N, 144-10 E
17 Jun RO-117 (Enomoto) VB-109 11-05 N, 150-31 E
19 Jun I-184 (Rikihisa) VT-60 from Swannee (CVE-27) 13-01 N, 149-53 E
22 Jun I-185 (Aral) Newcomb (DD-5S6) & Chandler (DD-206) 15-50 N, 147-08 E
24 Jun I-52 (Uno) VC-69 from Bogue (CVE-9) 15-16 N, 39-55 W
4 Jul I-10 (Nakajima) Riddle (DE-185) & David W. Taylor (DD-551) 15-26 N, 147-48 E
14 Jul (?) I-6 (Fumon) William C. Miller (DE-259) (?) 15-18 N,144-26 E (last reptd., 30 June)
-- Jul RO-48 (Ichitomi) Uncertain (could have been by Wm. C. Miller) N. of Saipan
17 Jul I-166 (Nichiuchi) HM Sub. Telemachus 05-10 N, 100-00 E
19 Jul I-5 (Doi) Wyman (DE-38) 13-01 N, 151-58 E
26 Jul I-29 (Kinashi) Sawfish (SS-276) 20-10 N, 121-50 E
28 Jul I-55 (Izuzu) Wyman (DE-3S) & Reynolds (DE-42) 14-26 N, 152-16 E
16 Sep I-364 (Makino) Sea Devil (SS-400) 34-30 N, 145-23 E
25 Sep RO-47 (Ishikawa) McCoy Reynolds (DE-440) 09-19 N, 136-44 E
3 Oct I-177 (Watanabe) Samuel S. Miles (DE-183) 07-48 N, 133-28 E
25 Oct I-54 (Nakayama) Richard M. Rowell (DE-403) 09-45 N, 126-45 E

--176--

Date Submarine Cause of Sinking Position
28 Oct I-46 (Yamaguchi) Helm (DD-388) 10-56 N, 127-13 E
29 Oct I-45 (Kawashima) Whitehurst (DE-634) 10-10 N, 127-28 E
12 Nov I-38 (Shimose) Nicholas (DD-449) 08-04 N, 138-03 E
17 Nov I-26 (Nishiuchi) Lawrence C. Taylor (DE-415), Melvin R. Nawman (DE-416), VC-81 Aircraft (E. of Leyte)
18 Nov I-41 (Kondo) VC-82 from Anzio (CVE-57) & Lawrence C. Taylor (DE-415) 12-44 N, 130-42 E
19 Nov I-37 (Kamimoto) Conklin (DE-439) & McCoy Reynolds (DE-440) 08-07 N, 134-16 E
29 Nov I-365 Scabbardfish (SS-397) 34-44 N, 141-01 E
1945  
(After 5 Jan) I-12 (Kudo) Probable marine casualty (U.S. Pacific waters)
18 Jan I-362 (Nakajima) Fleming (DE-32) 12-08 N, 154-37 E
23 Jan I-48 (Toyama) Conklin (DE-439), Corbesier (DE-438) & Raby (DE-698) 09-45 N, 138-20 E
31 Jan RO-115 (Takema) Bell (DD-587), O'Bannon (DD-450), Jenkins (DD-447) & Ulvert M. Moore (DE-442) 13-20 N, 119-20 E
7 Feb RO-55 (Suwa) Thomason (DE-203) 15-27 N, 119-25 E
11 Feb RO-112 (Yuchi) Batfish (SS-310) 18-53 N, 121-50 E
13 Feb RO-113 (Harada) Batfish (SS-310) 19-10 N, 121-23 E
24 Feb I-371 (Kamijukoku) Lagarto (SS-371) 32-40 N, 132-33 E
26 Feb RO-43 (Ts'kigata) VC-82 from Anzio (CVE-57) 25-07 N, 140-19 E
26 Feb I-370 (Fujikawa) Finnegan (DE-307) 22-45 N, 141-27 E
27 Feb I-368 (Irisawa) VC-82 from Anzio (CVE-57) 24-43 N, 140-37 E
23 Mar RO-41 (Honda) Haggard (DD-555) 22-27 N, 132-19 E
31 Mar I-8 (Shinohara) Morrison (DD-560) & Stockton (DD-646) 25-29 N, 128-35 E
5 Apr RO-49 (Go) Hudson (DD-475) 26-22 N, 126-30 E
9 Apr RO-56 (Nagamatsu) Monssen (DD- 798) & Mertz (DD-691) 26-09 N, 130-21 E
12 Apr RO-64 (Muto) Mined in Hiroshima Bay 34-14 N, 132-16 E
18 Apr I-56 (Shoda) Heermann (DD-532), McCord (DD-534), Collett (DD-730), Mertz (DD-691), Uhlmann (DD-687) & VT-47 from Bataan (CVL-29) 26-42 N, 130-38 E
18 Apr RO-46 (Kimura) Sea Owl (SS-405) 19-17 N, 166-35 E
25 Apr RO-109 (Nakagawa) Horace A. Bass (DE-619) 21-58 N, 129-35 E
29 Apr I-44 (Masuzawa) VC-92 from Tulagi (CVE-72) 24-15 N, 131-16 E
30 May I-361 (Matsuura) VC-82 from Anzio (CVE-57) 22-22 N, 134-09 E
10 Jun I-122 (Mihara) Skate (SS-305) 37-29 N, 137-25 E
22 Jun I-204, I-352 Sunk by bombs before completion Kure
27 Jun I-165 (Ono) VPB-142 15-28 N, 153-39 E
14 Jul I-351 (Okayama) Bluefish (SS-222) 04-30 N, 110-00 E
16 Jul I-13 (Ohashi) VC-13 from Anzio (CVE-57) & Lawrence C. Taylor (DE-415) 34-28 N, 150-55 E
18 Jul I-372 (Takahashi) US Navy Aircraft 33-00 N, 133-00 E
28 July I-404 Sunk, unfinished, by Aircraft Sasebo
14 Aug I-373 (Inobe) Spikefish (SS-404) 29-02 N, 123-53 E

--177--

Related Resource: Dictionary of American Naval Fighting Ships


16 January 2008