The Ceramic grenade was a porcelain or terracotta pot with a bottleneck with a rubber stopper and a simple fuse. The detonator was a simple blasting cap attached to a five-second length of fuse.
- Length: 3" in diameter
- Weight: 11.5 oz
- Pottery, TNT and gunpowder
The Type 4 ceramic grenade was developed in Japan during the closing months of World War II. With much of its industrial infrastructure destroyed by Allied bombing and a growing shortage of raw materials, it was designed as a "last-ditch" hand grenade for defending Japan from a possible Allied invasion. After the war, large numbers of these weapons were acquired by the Yakuza.
In practice, the ceramic grenade acted much like a flashbang grenade; the blast would stun or incapacitate the victims more often than kill them. This allowed the user to temporarily disable his target before entering the room to finish him off.