![Photo: Japan Maritime Self-Defence Force](http://media.assettype.com/bairdmaritime%2Fimport%2Fwp-content%2Fuploads%2F201015-10-JMSDF.jpg?w=480&auto=format%2Ccompress&fit=max)
Mitsubishi Heavy Industries (MHI) has launched the first ship in a new class of diesel-electric attack submarines slated for the Japan Maritime Self-Defence Force (JMSDF).
The future JS Taigei and its sisters are being constructed as modified variants of the Sōryū-class submarines currently in service with the JMSDF. Each will have a length of 84 metres, a hull diameter of 9.1 metres, a displacement of 3,000 tonnes, lithium-ion batteries, and an armament consisting of torpedoes and Harpoon anti-ship missiles.
The future Taigei is expected to be commissioned into service by March 2022.