Patrol 1

26 Dec 1941 - 4 Feb 1942

Patrol 2

24 Apr 1942 - 11 Jun 1942

呂30 - Ro-30 - listed in JANAC (misidentified; Ro-30 was not sunk in the war; no submarine was lost at that time in that location)

伊28 - I-28

彰化丸 - Shoka Maru

Patrol 3

17 Jul 1942 - 10 Sep 1942

おはいを丸 - Ohio Maru

Patrol 4

8 Oct 1942 - 21 Nov 1942

Nanshin Maru - small vessel not credited to Tautog in JANAC

北安号 Hokuan Go - (listed as "Unknown Maru" in JANAC)

Patrol 5

15 Dec 1942 - 30 Jan 1943

＃２播州丸 - Banshu Maru No. 2

八州丸 - Hasshu Maru

Patrol 6

24 Feb 1943 - 19 Apr 1943

磯波 - Isonami

彼南丸 - Penang Maru

Patrol 7

11 May 1943 - 4 Jul 1943

神栄丸 - Shinei Maru

明天丸 - Meiten Maru

Patrol 8

7 Oct 1943 - 18 Nov 1943

Patrol 9

12 Dec 1943 - 20 Jan 1944

済州丸 - Saishu/Saisyu Maru

宇佐丸 - Usa Maru

Patrol 10

24 Feb 1944 - 23 Mar 1944

隆亜丸 - Ryua Maru

松仁丸 - Shojin Maru

白雲 - Shirakumo

日連丸 - Nichiren Maru

Patrol 11

17 Apr 1944 - 21 May 1944

良洋丸 - Ryoyo Maru - abandoned hulk, possibly salvageable

伏見丸 - Fushimi Maru

宮崎丸 - Miyazaki Maru

＃２万栄丸 Banei/Banyei Maru No. 2

Patrol 12

23 Jun 1944 10 Aug 1944

松丸 - Matsu Maru

Yawata Maru - small vessel not credited to Tautog in JANAC

Hokuryu Maru No. 1 - small vessel not credited to Tautog in JANAC

杭寧丸 - Konei Maru

Patrol 13

17 Dec 1944 - 1 Feb 1945

第15号輸送艦 - Transport No. 15

首里丸 - Shuri Maru

Osa Maru No. 11 Go - small vessel not credited to Tautog in JANAC

28 ships, 71,888 tons, including four very small ships (Nanshin Maru, Yawata Maru, Hokuryu Maru No. 1, and Osa Maru No. 11 Go) not credited to Tautog in JANAC. These figures do not include Ro-30 and Submarine Chaser No. 30, but do include Hokuan Go, identified only as an "Unknown Maru" in JANAC, and Ryoyo Maru, which had run aground and was abandoned, but could have been salvaged.

JANAC credits Tautog with 26 ships, including Ro-30, an "Unknown Maru" (Hokuan Go), and a small submarine chaser (Cha-30), and 72,606 tons sunk. Note that the criteria JANAC used included all Japanese Naval vessels (although JANAC did not usually count warships less than 500 tons that were converted from merchant ships) and all Japanese merchant vessels of 500 or more gross tons known or believed to have been lost during the war. Differences between JANAC figures and current research are noted above.

Alden-McDonald credit Tautog with 26 ships and 65,335 tons sunk, including Hokuan Go (called "Unknown Maru" in JANAC), and two small vessels (Nanshin Maru and Osa Maru No. 11 Go) not credited to Tautog in JANAC. However, they do not credit Tautog with sinking Ro-30 and Submarine Chaser No. 30. both of which were credited to Tautog in JANAC. In addition, Alden-McDonald credit Tautog with 3 ships sunk by mines laid by the submarine, totalling 12,946 tons.

SORG credits Tautog with 31 ships (over 500 tons), and 122,800 tons sunk.

Japanese Naval and Merchant Ship Losses - JANAC

JANAC on the Hyperwar website - https://www.ibiblio.org/hyperwar/Japan/IJN/JANAC-Losses/JANAC-Losses-6.html

SORG- http://archive.hnsa.org/doc/subreports-sorg.htm (Excel spreadsheet download)

Archives of the Pacific Fleet Submarine Museum (PFSM)

War Patrol Reports - USS Tautog

Japanese Merchant Ship Losses

Monthly Losses of Combatant and Non-Combatant Vessels

太平洋戦争時の喪失船舶明細表（汽船主体）- Lost Vessel table during the Pacific War (merchant vessels)

Alden, John D., and McDonald, Craig R. - U.S. & Allied Sub Successes in the Pacific & Far East during WWII - Fourth Edition, 2009

Cressman, Robert - The Official Chronology of the U.S. Navy in World War II, Naval Institute Press, 2000.

Wrecksite - https://www.wrecksite.eu/wrecksite.aspx

Miramar Ship Index - https://www.miramarshipindex.nz/

Imperial Japanese Navy Page - http://www.combinedfleet.com/

Wikipedia Japan - https://ja.wikipedia.org/wiki/トートグ_(潜水艦)

Japan Center for Asian Historical Records - National Archives of Japan - https://www.jacar.go.jp/index.html

uboat.net

Official U.S. Navy Photos - Naval History & Heritage Command

Archives of the Pacific Fleet Submarine Museum (PFSM)

Japanese Merchant Ship photos - Wrecksite - copyright owners retain all rights. Photos used on this site will be taken down should the owner request their removal.