Recognition Guide Warships of the Second World War

Imperial Japanese Navy — Submarine class

Ro-100-class submarine

The class in numbers

  • 18 Planned
  • 18 Completed
  • 18 Lost

Design and service

Type
Submarine
Navy
Imperial Japanese Navy
Built
1941–44
In commission
1942–45
Builders
  • Kure Naval Arsenal
  • Kawasaki Shipbuilding

Class specifications

Figures for the class as designed. Individual vessels varied, sometimes considerably — each vessel page carries its own configurations.

As built
Displacement, surfaced
601 long tons (611 t)
Displacement, submerged
782 long tons (795 t)
Length
60.9 m (199.8 ft) OA
Speed
14.2 knots (26.3 km/h, 16.3 mph)
Main gun
76 mm (3 in)
Armament
  • 4 × bow 533 mm torpedo tubes
  • 2 × 25 mm Type 96 anti-aircraft guns or 1 × 76.2 mm L/40 AA gun

Roster

Vessel Pennant Commissioned Fate
Japanese submarine Ro-100 1942 Sunk 1943
Japanese submarine Ro-101 1942 Sunk 1943
Japanese submarine Ro-102 1942 1943
Japanese submarine Ro-103 1942 1943
Japanese submarine Ro-104 1943 Sunk 1944
Japanese submarine Ro-105 1943 Sunk 1944
Japanese submarine Ro-106 1942 Sunk 1944
Japanese submarine Ro-107 1942 1943
Japanese submarine Ro-108 1943 Sunk 1944
Japanese submarine Ro-109 1943 Sunk 1945
Japanese submarine Ro-110 1943 Sunk 1944
Japanese submarine Ro-111 1943 Sunk 1944
Japanese submarine Ro-112 1943 Sunk 1945
Japanese submarine Ro-113 1943 Sunk 1945
Japanese submarine Ro-114 1943 Sunk 1944
Japanese submarine Ro-115 1943 Sunk 1945
Japanese submarine Ro-116 1944 Sunk 1944
Japanese submarine Ro-117 1944 Sunk 1944

Sources