| Ho-203 cannon | |
| Origin: | Empire of Japan |
| Type: | Aircraft cannon |
| Is Ranged: | yes |
| Is Uk: | yes |
| Weight: | 89kg (196lb) |
| Length: | 1532mm |
| Part Length: | 800mm |
| Cartridge: | 37 x 112R (475 g) |
| Caliber: | 37mm |
| Action: | Long recoil-operated |
| Rate: | 120 rounds/min |
| Velocity: | 570m/s |
| Range: | 900m (3,000feet) |
| Feed: | 15-round drum |
Ho-203 was a Japanese autocannon that saw considerable use during World War II. It was a long-recoil automation of the Year 11 Type direct-fire infantry gun. It was fed by a 15-round closed-loop ammunition belt. It was operationally used only as the nose gun of the Kawasaki Ki-45-KAIc and the Kawasaki Ki-102 heavy fighters of the Imperial Japanese Army Air Force.[1]