Japanese destroyer Hatsuharu 1933

Hatsuharu was the lead ship of six Hatsuharu-class destroyers built under the Circle One Program (Maru Ichi Keikaku) She was laid down on 14 May 1931, launched on 22 February 1933 and commissioned on 30 September 1933. She was assigned to Destroyer Division 21 of Destroyer Squadron 1 of the IJN 1st Fleet at the time of the attack on Pearl Harbor. 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. Each tube could be reloaded inTwenty-three seconds using the endless wire and winch provided. The ships were top-heavy design, with severe stability problems and with inherent structural weaknesses. They 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 . They were also armed with 25 mm (0.98 in) Type 96 anti-aircraft guns and a Type 22 radar.