| Is Missile: | yes |
| Type 90 ship-to-ship missile, SSM-1B | |
| Origin: | Japan |
| Type: | Anti-ship cruise missile |
| Used By: | Japan Maritime Self-Defense Force |
| Manufacturer: | Mitsubishi Heavy Industries |
| Number: | >384 |
| Service: | 1990 |
| Engine: | TJM2 turbojet + 1 solid rocket booster |
| Weight: | 661kg (1,457lb) |
| Length: | 5.081NaN1 |
| Diameter: | 3501NaN1 |
| Wingspan: | 1.21NaN1 |
| Speed: | 11500NaN0 |
| Vehicle Range: | NaN0NaN0 |
| Altitude: | 5-6m |
| Filling: | high explosive |
| Filling Weight: | 260kg (570lb) |
| Guidance: | Inertial guidance and terminal active radar homing |
| Launch Platform: | Asahi, Akizuki, Atago, Takanami, Murasame destroyer classes; Hayabusa-class missile boats |
The Type 90 ship-to-ship missile (Japanese: 90式艦対艦誘導弾, SSM-1B) is a ship-launched anti-ship missile developed by Japan's Mitsubishi Heavy Industries. The Type-90 entered service in 1990.[1] It is a naval version of the truck-launched Type 88 (SSM-1) missile, which in turn was developed from the air-launched Type 80 (ASM-1) missile. The Japan Maritime Self-Defense Force bought 384 of the missiles, which were fitted to their Murasame, Takanami, Atago, Akizuki, and Asahi classes of destroyers, as well as Hayabusa-class fast-attack missile boats. With a range of 1500NaN0, high subsonic speed and a 260kg (570lb) warhead, the natively-developed Type 90 is similar to the US Harpoon missile Block-1C (RGM-84D) variant which replaced it and first installed on the 9 Murasame-class destroyers that started series production in 1994.