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Hatsuharu-class destroyer
The were a class of Imperial Japanese Navy destroyers in the service before and during World War II. The final two vessels in the class, completed after modifications to the design, are sometimes considered a separate "''Ariake'' class".
==Background==
In compliance with the 1930 London Naval Treaty, the ''Hatsuharu''-class vessels were significantly smaller than the previous and destroyers. However, Japanese naval designers attempted to stretch contemporary destroyer design to the limit and beyond by equipping the new class with an armament only slightly weaker than that carried by the earlier classes, despite its smaller hull and displacement.〔GlobalSecurity.org: (IJN ''Hatsuharu'' class )〕
This resulted in a top-heavy design, with severe stability problems, and the weight-control measures used by designers to fit as much armament as possible onto a ship of a given tonnage were carried to an extreme, which further contributed to the structural weaknesses of the ships of this period. This was graphically demonstrated when the torpedo boat capsized in 1934 during heavy seas (the "Tomozuru Incident") and when a typhoon ripped the bows off two ''Fubuki''-class destroyers (the "IJN 4th Fleet Incident") in 1935. As a result of these two incidents the ''Hatsuharu''-class vessels had to be rebuilt (the first two completed had to be rebuilt twice) or modified while building to remedy their stability problems.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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