After being formally approved in 1989 and named "Type 89", it entered service and is currently carried aboard the  Oyashio, and Sōryū class submarines. It was also carried by the Yuushio and  Harushio class submarine before they were retired from active service in 2006 and 2017 respectively.
The Type 89 system was formally introduced in 1989 and subsequently deployed on board the Oyashio, and Sōryū class submarines. It had also been employed by the Yuushio and Harushio class submarine prior to their decommissioning from service in 2006 and 2017.