Japanese destroyer Hatsuharu

History
Hatsuharu in 1934, after modifications to improve stability.
Empire of Japan
Name:	Hatsuharu
Ordered:	1931 Fiscal Year
Builder:	Sasebo Naval Arsenal
Laid down:	14 May 1931
Launched:	22 February 1933
Commissioned:	30 September 1933
Struck:	10 January 1945
Fate:	Sunk in action, 13 November 1944
General characteristics
Class and type:	Hatsuharu-class destroyer
Displacement:	1,802 long tons (1,831 t)
Length:	103.5 m (340 ft) pp, 105.5 m (346 ft) waterline 109.5 m (359 ft) overall
Beam:	10 m (32 ft 10 in)
Draught:	3 m (9 ft 10 in)
Propulsion:	2 shaft Kampon geared turbines 3 boilers, 42,000 hp (31,000 kW)
Speed:	36 knots (41 mph; 67 km/h)
Range:	4,000 nmi (7,400 km) at 14 kn (26 km/h)
Complement:	200
Armament:	(as built) 2 × 2, 1 × 1 - 12.7 cm/50 Type 3 naval gun 2 × 1 - 40 mm AA guns 3 × 3 - 61 cm (24 in) torpedo tubes 18 × depth charges
Service record

Hatsuharu (初春, ”Early Spring”), the second Imperial Japanese Navy destroyer of the name, was the lead ship of six Hatsuharu-class destroyers built under the Circle One Program (Maru Ichi Keikaku). Three were laid down in JFY 1931 and the next three in JFY 1933. The remaining six ships in the plan were built as the Shiratsuyu class.

Construction of the advanced Hatsuharu-class destroyers was intended to give the Imperial Japanese Navy smaller and more economical destroyers than the previous Fubuki and Akatsuki-class destroyers, but with essentially the same weaponry. These conflicting goals proved beyond contemporary destroyer design, and the resulting ships were top-heavy design, with severe stability problems and with inherent structural weaknesses. After the "Tomozuru Incident" of 1934 and "IJN 4th Fleet Incident" in 1935, Hatsuharu underwent extensive modifications on completion to remedy these issues.

Hatsuharu-class destroyers used the same 50 caliber 12.7 cm gun as the Fubuki class, but all turrets could elevate to 75° to give the main guns a minimal ability to engage aircraft .

The 61 cm Type 90 torpedo was mounted in triple tube Type 90 Model 2 launchers It was traversed by an electro-hydraulic system and could traverse 360° in twenty-five seconds. If the backup manual system was used the time required increased to two minutes. Each tube could be reloaded in twenty-three seconds using the endless wire and winch provided.Hatsuharu was laid down on 14 May 1931, launched on 22 February 1933 and commissioned on 30 September 1933.

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