JMSDF had already announced plans that they will build up a fleet of 22 boats. The Oyashio class will go into a mid life extension plan in the next decade, I believe.JMSDF has 11 x Oyashio class with one converted into training
Now planned more Soryu class
Do they plan on replacing any of the Oyashio class with the Soryu or are these a parallel build ?
Otherwise they will have in excess of 20 x SSK
Very 21st centryish
Japan's Ministry of Defense (MoD) announced that it will conduct a live fire experiment of the new XASM-3 supersonic anti-ship missile in the Sea of Japan next year. The missile will be tested against a decommissioned Destroyer of the Japan Maritime Self-Defense Force (JMSDF). XASM-3 is currently in development by Mitsubishi Heavy Industries and the Japanese MoD to replace the existing ASM-1 and ASM-2 missiles.
So they finally confirmed speculations that had been made 6 months ago.Japan to Test its New XASM-3 Supersonic Anti-Ship Missile Against Shirane-class Destroyer