He produced ukiyo-e prints and paintings, gesaku novels, and kyōka and haiku poetry.
Shunman was born in about 1757 (Hōreki 7 on the Japanese calendar) with the surname of either Kubo (窪) or Kubota (窪田) and the given name Yasubei (易兵衛 or 安兵衛).
[2] He studied under Katori Nahiko [ja], a poet, kokugaku scholar, and painter in the style of the Chinese Shen Quan.
[1] Upon finishing his apprenticeship took the art name Shunman (first spelt 春満, later 俊満).
Other art names he used include Shōsadō (尚左堂) and Sashōdō (左尚堂), both of which use the character 左 sa, meaning "left", as he was left-handed.