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The was a type of oiler of Japan, serving during the 1930s and World War II. They do not have official class name.〔Iino Lines called ''Tōa Maru'' class, Kawasaki Line called ''Tatekawa Maru'' class, Nittō Mining called ''Nichiei Maru'' class, and more..〕 Therefore, this article uses common class names. And, this type has some variants. This article handles them collectively. ==Background== * The London Naval Treaty forced shrinkage of a budget to the Imperial Japanese Navy (IJN). And it meant cooling of the Japanese shipbuilding industry worlds. The Great Depression more accelerated it. The IJN wanted to update their ''Notoro''-class oilers and ''Ondo''-class oilers, because these oilers were not able to chase the aircraft carrier. * In 1929, the IJN decided their combat ship (battleship, aircraft carrier, cruiser, destroyer, submarine and torpedo boat) fuel only to heavy crude oil. And, the IJN was paid a grant to newly build large/high-speed tankers. * In 1931, two marine transportation companies built the tankers which the IJN wanted. One was the 9,900 tons/17.5 knot ''Teiyō Maru'', the other the 9,500 tons/18.8 knots ''Fujisan Maru''. * The IJN was satisfied by ''Fujisan Maru''. The IJN recommended building of the improved ''Fujisan Maru'' class tanker. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kawasaki-type oiler」の詳細全文を読む スポンサード リンク
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