![Houroku-Hiya. Hand grenades that were used by ninjas centuries before firearms were introduced to Japan. : r/WeirdWeapons Houroku-Hiya. Hand grenades that were used by ninjas centuries before firearms were introduced to Japan. : r/WeirdWeapons](https://i.redd.it/87mlioaxk3p21.jpg)
Houroku-Hiya. Hand grenades that were used by ninjas centuries before firearms were introduced to Japan. : r/WeirdWeapons
![Byzantine 'Greek Fire' hand grenade of molded pottery, dated Ca. 900-1200, measuring 125mm x 80mm, wt. 550g. It held a feared, highly combustible substance posited to contain pine resin, naphtha, quicklime and Byzantine 'Greek Fire' hand grenade of molded pottery, dated Ca. 900-1200, measuring 125mm x 80mm, wt. 550g. It held a feared, highly combustible substance posited to contain pine resin, naphtha, quicklime and](https://i.redd.it/qp9cqqoy4i5a1.jpg)
Byzantine 'Greek Fire' hand grenade of molded pottery, dated Ca. 900-1200, measuring 125mm x 80mm, wt. 550g. It held a feared, highly combustible substance posited to contain pine resin, naphtha, quicklime and
![Original Japanese WWII Type 4 Ceramic Hand Grenade in Flat White Glaze – International Military Antiques Original Japanese WWII Type 4 Ceramic Hand Grenade in Flat White Glaze – International Military Antiques](https://www.ima-usa.com/cdn/shop/products/ONSV8554M__02.jpg?v=1655564505)