Similar to 伊号第百八十一潜水艦

Italian submarine Luigi Torelli

Japanese submarine Ro-30

Japanese submarine Ro-31

Japanese submarine Ro-32

Japanese submarine Ro-46

Japanese submarine Ro-47

Japanese submarine Ro-48

Japanese submarine Ro-49

Japanese submarine Ro-50

Japanese submarine Ro-55 (1944)

Japanese submarine Ro-56 (1944)