Similar to 伊号第百八十一潜水艦

Japanese submarine I-26

Japanese submarine I-32

Japanese submarine I-73

Japanese submarine I-53 (1925)

Japanese submarine I-64

Japanese submarine I-165

Japanese submarine I-166

Japanese submarine I-168

Japanese submarine I-72

Japanese submarine I-174

Japanese submarine I-53 (1942)

Japanese submarine I-366

Japanese submarine I-369

Japanese submarine Ro-34

Japanese submarine Ro-45

Japanese submarine Ro-60

Japanese submarine Ro-61

Japanese submarine Ro-62

Japanese submarine Ro-63

Japanese submarine Ro-65

Japanese submarine Ro-66

Japanese submarine Ro-67

Japanese submarine Ro-68

Japanese submarine chaser Cha-2

German submarine U-537