Akizuki-class destroyer (1959)

As a result, the project of this class was financed by the Off Shore Procurement (OSP) of the United States, but design and construction were completely indigenous.

[1] Like its predecessors, the Murasame and Ayanami classes, this class adopted a "long forecastle" design with inclined afterdeck called "Holland Slope", named after the scenic sloping street in Nagasaki City.

[2] With the enlargement of the hull, the steam turbine propulsion system was uprated with higher-pressure boilers (570 psi).

While the JMSDF desired this American ASW rocket launcher originally, it became clear that its performance wasn't as good as was believed.

It was later replaced by a Type 71 375 mm (15 in) quadruple ASW rocket launcher (the Japanese version of the Swedish M/50) in 1976.