Koshigaya Gozan was a Japanese poet and haiku master of the Edo period. He was born in Koshigaya, Saitama Prefecture, in 1717, and lived in Edo (Tokyo) for most of his life. He was a member of the Danrin school of haiku, and his poems are known for their wit, humor, and wordplay.
He was also a prolific painter, and his work is often seen as a reflection of his haiku. Gozan died in 1788 at the age of 71. He is considered one of the most important haiku poets of the Edo period, and his work continues to be read and appreciated today.