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The was a type of 1st class submarine operated by the Imperial Japanese Navy (IJN) before and during World War II. The type name, was shortened to .〔The read as "Kai-Dai", but the read as "Ō-gata" in Japanese.〕 All ''Kaidai'' class submarines originally had a two digit boat name, from ''I-51'' onwards. On 20 May 1942, all Kaidai submarines added a '1' to their name. For example, ''I-52'' became ''I-152''. Ships are listed by the three digit boat name if they had one, two digit if they were not granted one or left service before 20 May 1942. ==Class variants== The ''Kaidai'' type submarines were divided into seven classes and two sub-classes: * * * * * * * * * 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「Kaidai type submarine」の詳細全文を読む スポンサード リンク
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