Type 89 torpedo
The Type 89 torpedo is a Japanese submarine-launched homing torpedo produced by Mitsubishi Heavy Industries. Together with the Harpoon, it replaced the unguided Japanese [53 cm torpedo#Type 72|Type 72]. Development was done by the Technical Research and Development Institute, a department of the Ministry of [Defense (Japan)|Ministry of Defense], and began in 1970, with the design completed by 1984. After being formally approved in 1989 and named "Type 89", it entered service and is currently carried aboard the, and -class submarines. It was also carried by the and -class submarines before they were retired from active service in 2006 and 2017 respectively.
It is a wire-guided torpedo that features both active and passive homing modes. Compared to Mk-48 torpedo, it is slightly longer and heavier, but has a smaller warhead.
The successor to the Type 89 torpedo was developed under the development name "G-RX6" and officially named Type 18 in 2018. The is equipped with a number of Type 18 torpedoes.