thumb|300px|An Edo period wood block print showing samurai gunners firing bo-hiya with hiya-zutsu (rocket guns)
thumb|300px|An Edo period wood block print showing samurai gunners firing bo-hiya with hiya-zutsu (rocket guns)
A was an early Japanese rocket launcher and development of the fire arrow.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).