| Type 5 cannon | |
| Origin: | Imperial Japanese Navy |
| Type: | Aircraft cannon |
| Is Ranged: | yes |
| Is Uk: | yes |
| Length: | 2070mm |
| Part Length: | 1350mm |
| Weight: | 70abbr=onNaNabbr=on |
| Cartridge: | 30 x 122 mm (345 g) |
| Caliber: | 30mm |
| Action: | Short recoil-operated |
| Rate: | 435-450 rounds/min |
| Velocity: | 920m/s |
| Feed: | Belt |
The 30 mm Type 5 cannon was a Japanese Navy autocannon used near the end of World War II. It was an indigenous 30 mm design with better performance than the Navy's earlier Oerlikon-derived Type 2 or the Imperial Army's Browning-derived Ho-155, although it was considerably heavier. The Type 5 was to have become the standard fighter cannon of the Japanese Navy – four would have been mounted on the J7W Shinden – but by the end of the war had seen use on only a few aircraft, including variants of the Mitsubishi J2M and Yokosuka P1Y.
Cannon was constructed by engineer Masaya Kawamura, in Nihon Tokushu-Ko KK, and produced in Navy factories in Toyokawa and also in small numbers KK Nihon Seikojo and Nihon Tokushu-Ko KK.[1]