Japanese navy ordered building of 4 destroyers according to the Australia Station Intelligence Summary dated 1 December 1956

An item reported that the shipbuilding companies Mitsubishi, Kawasaki and Mitsui were contracted to built 4-2,100 tons destroyers for the Japanese Maritime Self-Defense Force budgeted under the 1955-1956 Fiscal Year.(1)

Note

1. The Wave or Ayanami-class destroyers preceded by Harukaze class succeeded by Murasame-class, with a displacement of 1,700-1,720 (standard)-2,500 (full load) tons consisting of the Ayanami (DD103) built by Mitsubishi Zosen Co., Nagasaki, the Isonami (DD 104) by Shin-Mitsubishi Jyuko Co., Kobe, the Shikinami (DD 106) by Mitsui, Tamano and the Uranami (DD 105) byKawasaki Jyuko Co., Kobe. Finally this class numbered 7 units including the Takanami (DD 110), Onami (DD 111) and Makinami (DD 112).

Source

Website Royal Australian Navy, Sea Power Centre.