The Type 12 Torpedo (12式短魚雷, 12 Shiki Tan Gyorai, development name G-RX5) is a lightweight anti-submarine homing torpedo developed by the Technical Research and Development Institute, a department of the Japanese Ministry of Defense and built by Mitsubishi Heavy Industries for the Japanese Maritime Self Defense Force.
| Type 12 | |
|---|---|
 | |
| Type | Torpedo |
| Place of origin | Japan |
| Service history | |
| In service | 2012 – present |
| Used by | Japan Maritime Self-Defense Force |
| Production history | |
| Designed | 2005–2012 |
| Manufacturer | Mitsubishi Heavy Industries |
| Specifications | |
| Diameter | 324 mm |