Japan's Mitsubishi Heavy Industries (MHI) has commenced construction of the first of a new class of at least three diesel-electric attack submarines (SSKs) to supplement the Japan Maritime Self-Defense Force's (JMSDF's) fleet of Soryu-class SSKs, a company spokesperson told Jane's on 4 July.
Both MHI and the JMSDF declined to provide details about the new 3,000-tonne SSK class, the name of which has yet to be agreed upon. However, documents released by the Japan Ministry of Defense (MoD) over the past few years show that the first boat, which is expected to enter service in March 2022, is being referred to as '29SS'.
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