The 1st JMSDF OYASHIO program submarine premiered in 1998. 9 submarines wound up being taking solution in JMSDF till 2006. Two much more of this course are building or on purchase, because of the tenth planned to payment in 2007. The 268-foot submarines carry 20 torpedoes or UGM-84C Harpoon missiles, unlike the 3 past Japanese submarine classes, have actually bow-mounted torpedo pipes and conformal sonar arrays.