The Type 97 hand grenade was the main grenade used by Japanese forces during the Second World War. It was more or less just the earlier multi-purpose Type 91 grenade with the attachment socket for a propellant canister deleted from the base, preventing it from being used as a rifle grenade or light mortar projectile as the Type 91 could be, and with the 7-8 second fuze replaced with a 4-5 second fuze to prevent the grenade being thrown back.
The grenade still suffered from the same bizarre fuze design as the Type 91, extreme variations in fuze burn time, and was still not particularly effective compared to other WW2 designs due to its small explosive content and cylindrical body which made throwing it uphill a hazardous activity.
The Type 97 High-Explosive Fragmentation hand grenade can be seen in the following films and video games used by the following actors: