Patrol 1

25 Jul 1943 - 13 Sep1943

No attacks

Patrol 2

4 Oct 1943 - 16 Nov 1943

No sinkings

Patrol 3

8 Dec 1943 - 15 Jan 1944

清澄丸 Kiyosumi Maru - heavily damaged by Balao, later sunk by aircraft- not credited to Balao in JANAC

Patrol 4

6 Feb 1944 - 19 Mar 1944

日紀丸 Nikki Maru

昭浦丸 Akiura Maru

昭鳳丸 Shoho Maru

Patrol 5

24 Apr 1944 - 12 Jun 1944

No sinkings

Patrol 6

5 Jul 1944 - 22 Aug 1944

Patrol 7

4 Dec 1944 - 19 Jan 1945

Unidentified Schooner - not credited to Balao in JANAC

大剛丸 Daigo Maru

Patrol 8

27 Feb 1945 - 8 Apr 1945

Daito Maru No. 2 - small vessel not credited to Balao in JANAC

筥崎丸 Hakozaki Maru

Eisa Maru No. 1 - small vessel not credited to Balao in JANAC

Eisa Maru No. 2 - small vessel not credited to Balao in JANAC

Katsura Mari No. 11 - small vessel not credited to Balao in JANAC

第一新東丸 Shinto Maru No. 1

Patrol 9

3 May 1945 - 7 Jun 1945

Patrol 10

7 Jul 1945 - 25 Aug 1945

15 ships, 40,900 tons, including partial credit for Kiyosumi Maru shared with aircraft, and 8 small vessels not credited to Balao in JANAC, The tonnage of Nisso Maru No. 77, Katsura Maru No. 11, as well as the three unidentified vessels that Balao sank is unknown, and therefore not included in the tonnage figure above. Alden-McDonald credit Balao with the same figures used above.

JANAC - 6 ships, 31,920 tons. 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.

SORG credits Balao with 18 ships and 57,100 tons sunk.

Japanese Naval and Merchant Ship Losses - JANAC on the NHHC website

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 Balao

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/

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

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.