IJN | Japanese escort Shimushu | IJN ''Shimushu'' | IJN ''Tsugaru'' |
The island was formerly administered as part of Shimushu District of Nemuro Subprefecture of HokkaidÅ.
Escort ship IJN Shimushu escorted transports Zenyo Maru, Miike Maru and Toho Maru to Nakorn Sri Thammarat, southern Thailand, with more of the 143rd Regiment
Salvaged by Japan, it was refitted and commissioned into the Imperial Japanese Navy as IJN Tsugaru.