page_title: Mutsuki-class destroyer
section_title: Design
hierarchical_section_title: Mutsuki-class destroyer / Design
context_page_description: The Mutsuki-class destroyers were a class of twelve destroyers of the Imperial Japanese Navy. All were given traditional poetic names of the months of the year by the Lunar calendar or phases of the moon. Some authors consider the Kamikaze and Mutsuki-class destroyers to be extensions of the earlier Minekaze class.
context_section_description: The Mutsuki-class destroyers were based on the same hull design as the previous Kamikaze class, except with a double curvature configuration of the bow, a feature to improve seaworthiness which became a standard in all later Japanese destroyers.
  The engines utilized four Kampon boilers running two-shaft geared turbines at 38,500 shp, yielding a rated speed of 37 knots (69 km/h), although subsequently modifications increased displacement, and correspondingly reduced speed to 33 knots.
  After the Fourth Fleet Incident of September 1935, during which many ships in the Imperial Japanese Navy were damaged by a typhoon while on training exercises, weaknesses in the Mutsuki-class were addressed by retrofitting with a strengthened, more compact, bridge, with raked smokestacks, and with redesigned watertight shields on the torpedo mounts. With these new shields torpedoes could be worked in all weather conditions, thus extending the useful life of the class.
  In 1942, Mikazuki had a boiler removed and her aft stack was reduced in size – she was the only ship of the class so modified. Yayoi had a similar reduction to her forward funnel; again, she was the only ship of the class so adapted. Between September 1942 and December 1943, Uzuki had her stern modified to facilitate the launching and recovery of landing barges. She was the only ship of the class to be modified as a destroyer transport.
caption: Office of Naval Intelligence recognition drawing of Mutsuki class
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