RIKUGUN YUSOSEN

Choyo Maru Class Auxiliary Transport

(CHOYO MARU, prewar)

© 2016 Bob Hackett


CHOYO MARU was completed in 1919 as the first of nine new 5,450(nominal) ton passenger/cargo ships built by the Asano shipyard. In 1936, CHOYO MARU ran aground in dense fog off the east coast of Sakhalin.

CHOYO MARUís sisters were MEIYO, TOKUYO, FUKUYO, BIYO, REIYO, HAYO, OYO (ex-WOYO) and JUYO MARUs.

CHOYO, MEIYO and TOKUYO MARUs were lost pre-war by marine casualties. During the Pacific War, FUKUYO, HAYO and OYO MARUs were torpedoed and sunk by American submarines while MEIYO and REIYO MARUS were bombed and sunk by American air attacks. BIYO MARU survived the war in a battle-damaged, non-navigable condition.

Builder and
Years Completed:
Asano Shipbuilding Co., Tsurumi
1919-1926
Gross tonnage: 5,450 (nominal)tons.
Dimensions: 121.9 x 16.2 x 32í
Propulsion: 1 x 3-cyl. triple expansion engine, single shaft, 1 screw, 513 n.h.p.
Speed: 12 knots
Armament: Unknown