Oyashio-class submarine

The Oyashio is a class of Japanese diesel-electric submarine operated by the JMSDF. The submarines entered service in the late 1990s. The submarines are larger than the earlier Harushio-class submarines, to provide space for a flank sonar array.

Boats
There are a total of 11 boats in the class - the last boat was commissioned in 2008. Oyashio, Michishio, and Kuroshio share their names with WWII destroyers Takashio shares a name with a third set of Yugumo class destroyers, of which none were built.