Mori sosen (1747-1821) was a painter active in Osaka in the late Edo period. Some say he was born in Nagasaki, some say in Osaka, and some say in Nishinomiya. His first name was Morizo, and his last name was Shukiba. He was first called Sosen, but later changed his name to sosen at the suggestion of Shibano Ritsuzan.
Influenced by the Kano school and Maruyama Okyo, he pursued his own style of painting and became the founder of the Mori school, which was continued by his adopted son, Mori Tetsuzan. He mainly painted animal paintings, with a particular specialty in monkey paintings.