Allied Warships
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U-boat Fates
U-boats turned over to Japan
All subs were handed over in Harwich, UK on 19 Dec 1918 and departed Devonport in two divisions (on 18 Feb and 6 Mar 1919), towed by departing IJN destroyers which had finished their service in European waters. They proceeded to Japan via Mediterranean and the Suez Canal.
Logistical support during the voyage was provided by the depot ship Kwanto. Both groups arrived at Yokosuka on 18 June 1919.
In 1921 all seven were partially dismantled (all armament, machinery and conning towers removed).
| Fate | |
| U 46 | Surrendered to Japan. In japanese service as the O2 1920-21.
Partially dismantled at Kure Navy Yard in April 1921 but then rebuilt at Yokosuka Navy Yard 1925 as a testbed for submarine salvage operations carried out by the tender ASAHI. During her transfer from Yokosuka to Kure on 21 April 1925 she was caught by a storm (not typhoon as written in some sources) and lost. On 5 Aug \'27 her hulk was spotted by a U.S. merchant west of Oahu and later scuttled. |
| U 55 | Surrendered to Japan. In japanese service as the O3 1920-21. Dismantled at Sasebo Navy Yard between March and June 1921. In 1923 she was briefly re-commissioned as Auxiliary Vessel No. 2538. |
| U 125 | Surrendered to Japan. In japanese service as the O1 1920-21.
Dismantled at Yokosuka Navy Yard between January and March 1921. Between March 1924 and January 1925 she was used as a floating jetty at the Kure Submarine School. In 1925 she was rebuilt at Yokosuka as testbed for submarine salvage operations carried out by the tender ASAHI. On 19 Aug 1931 U 125 was re-commissioned as Auxiliary Vessel No. 2900 and used until 1935. |
| UC 90 | Surrendered to Japan. In japanese service as the O4 1920-21. Dismantled at Kure Navy Yard in 1921. Between December 1924 and December 1926 she was used at Kure Submarine School as a ASW target, then sold for scrap. |
| UC 99 | Surrendered to Japan. In japanese service as the O5 1920-21. Dismantled at Yokosuka Navy Yard between March and June 1921. In October 1921 her hull was expended as a target for naval shells and torpedoes. |
| UB 125 | Surrendered to Japan. In japanese service as the O6 1920-21. Broken up at Kure at the Sasebo Navy Yard by June 1921 and later used as a floating jetty at Sasebo. |
| UB 143 | Surrendered to Japan. In japanese service as the O7 1920-21. Dismantled at Yokosuka Navy Yard by June 1921, since Feb 1924 used as a floating jetty at Yokosuka. |
7 U-boats turned over to Japan.