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In March 1942, the Japanese began construction of merchant tankers built to standard designs by private yards. Thirty-four tankers of the 1ML design were completed during the war including ASANAGI, ASASHIO, BANEI, BOKUEI, EIHO, MENEI, MUTSUEI, NICHINAU, RYUEI, SHIMPO, TARAKAN, TENNAN and YUHO MARUs and EIYO MARU No. 2 and 20 others.
| Builders and Years Completed: |
Mitsubishi, Nagasaki, Harima, Aioi and others 1943-1944. |
| Gross Tonnage: | 5,200-tons (nominal). |
| Dimensions: | 416' x 53’ x 24’ |
| Propulsion: | Geared turbine, 3,600 shp, maximum speed 15 knots |
| Oil Cargo Capacity: | 58,640 barrels @42 gals/barrel or approx. 8,000-tons of crude oil @7.33 barrels per metric ton |
| Armament: | Unknown |

