Peacetime Standard Merchant Type 1Bs were not significantly different from Type 1BWartime cargo designs. The Type 1Bs used coal-fired steam turbine engines with machinery admidships. They had five deck hatches and double bottoms.
| Builders: | Mitsubishi Jukogyo K.K. Zosensho, Yokohama and others. |
| Years Completed: | 1937-1942. |
| Gross Tonnage: | 4,300-tons nominal |
| Dimensions: | 367.5' x 51'3" x 29'6" |
| Propulsion: | Coal fired, turbine engine, 1-shaft, cruising speed 11 knots, |
| Armament: | Unknown |
