The Type F submarines (F型潜水艦, F-gata Sensuikan) were medium Imperial Japanese Navy submarines in commission during the 1920s. They were Japan's first true seagoing submarines and the earliest Japanese submarines classified as "second-class" or "medium" submarines.
Unit Run[]
Type F1[]
- IJN Ro-1
- IJN Ro-2
Type F2[]
- IJN Ro-3
- IJN Ro-4
- IJN Ro-5
- IJN Ro-6
- IJN Ro-7
- IJN Ro-8
- IJN Ro-9
- IJN Ro-10