MAST Asia: Mitsui Unveils OPV Design Proposal for JMSDF OPV Requirement
https://www.navalnews.com/event-news/mast-asia-2019/2019/06/mast-asia-mitsui-unveils-opv-design-proposal-for-jmsdf-opv-requirement/
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護衛艦54隻体制に加えてこんなのまで12隻量産されるとなると相当強大な艦隊になりそう