Bo-hiya

A bo-hiya (棒火矢, Bō hiya) was an early Japanese rocket launcher and development of the fire arrow.

Fire arrows of some type have been used in Japan as far back as the 6th century where they are said to have been used during a military campaign in Korea.

These rocket-type bo-hiya had the appearance of a thick arrow with large fins, a wood shaft and a metal tip; they resembled the Korean chongtong, an arrow-firing cannon.

[3] Bo-hiya were ignited by lighting a fuse made from incendiary waterproof rope which was wrapped around the shaft; when lit the bo-hiya was launched from either a wide-bore cannon, a form of tanegashima (Japanese matchlock) called hiya zutsu, or from a mortar-like weapon (hiya taihou).

[4] Bo-hiya were standard equipment on Japanese military vessels, where they were used to set fire to enemy ships.