Army Vessels Sempaku (Government Ships/Requisitioned Ships) Tokushusen (Dock Landing Ships) Tokushuyusosen (MAC Ships) Ogata Juryobutsu Umpansen (Crane Ships) Bokusen (A/A Ships) Tsushinsen (Communication Ships) Kosakusen/Koku Kosakusen (Repair Ships/Aircraft Repair Ships) Densen Fusetsusen (Cable Layers) Byoinsen (Hospital Ships) Yusosen (Tankers) Yusosen (Transports) Suisen (Water Supply Ships) Saihyosen (Icebreakers) Kyoryoku Eisen (Tugs/Escorts) Sho Jokisen (Small Steam Ships) Gyo Series Seized Ships Shutei (Equipments/Armaments built by the Japanese Army) Yusoyo Shutei (Landing Crafts/ Transports) Kidotei (Landing Ships) Senko Yusotei (Submarine Transports) Ogata Hatsudotei (Large Crafts for Long-distance) Tokudai Hatusdotei (Landing Crafts- Tanks) Tetsusei Dai Hatsudotei (Landing Crafts- Large) Mokusei Dai Hatsudotei (Wooden Landing Crafts- Large) Sho Hatsudotei (Landing Crafts- Small) Sho Yusotei (Small Transports) Kei Jorikutei (Midget Landing Boats) Kosoku Yusotei (High Speed Transports) Sentoyo Shutei (Crafts for Attack) Kogekitei (Submerge/Semi-submerge Attack Crafts/ Suicide Motor Boats) Kuchikutei (Motor Patrol Boats) Sokotei (Armored Motor Boats) Kosokutei Ko (Reconnaissance Crafts) Kosokutei Otsu (Communication Crafts) Goeitei (Escort Crafts) Hojo Shutei (Auxiliary Crafts) Oritatamitei (Double Backing Crafts) Kitsuki Fushu (Self-propelled Barge) Fushu (Barge) Shuritei (Repair Crafts) Raigun Haitosen (Transports allotted to Army by Sempaku Uneikai)
Please note that the list below is not official. In my private view, the Army divided its vessels into two categories of Sempaku and Shutei. Sempaku are ships, which transport personnel and munitions, or support ships such as tugs or water supply ships. Shutei are weapons, which are mass-produced on the basis of prototypes.
For the former, I referred to "Showa Zosen Shi" published by Hara Shobo in 1977 for categorising. Then I added ships that had special duties such as A/A ships and Hospital Ship to it. (* Showa Zosen Shi means history of shipbuilding in Showa era (1926-).
For the latter, I referred to table of "Kaiun Kizai no Meisho, Kubun, Ruibetsu narabini Ki(Hi)mitsu toriatsukai ni kansuru ken rikugun ippan ni tucho" (JACAR: C01007870400). (* Kaiun Kizai..... means a notice to Army in general regarding titles, categories, classification and secret grade of maritime transport equipments.)
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