JS Makishio (SS-593) is the fourth boat of the Oyashio-class submarines.

[1] Makishio was laid down at Mitsubishi Heavy Industries Kobe Shipyard on 6 March 1996 and launched on 26 November 1998.

[citation needed] The submarine participated in RIMPAC 2019 from 30 March to 29 June 2019, and she conducted offshore training and facility use training in the Hawaiian Islands area.

[4] Upon Oyashio's decommissioning on 17 March 2023, Makishio was converted to a training submarine as a replacement.

[5] Media related to JS Makishio (SS-593) at Wikimedia Commons