Kōsetsu Sōritsu (1599–1666) was a Rinzai Zen monk active in the early Edo period.
He was also known by the sobriquets Fujoshi, Kotaishi, Hakaishi, and Fujomu.

Born in Izumi Province (present-day Osaka Prefecture), he entered monastic life at Kyokurensha (Da Amida-kyō-ji). He later studied under Takuan Sōhō, and subsequently under Kōgetsu Sōgan, from whom he received dharma transmission. He became head monk (shuso) of Ryūkō-in.

In 1644 (Kan’ei 21), he rose within Daitoku-ji Temple to become its 181st abbot.
He later founded Koshinji Temple in Chikuzen (present-day Fukuoka Prefecture). In 1651 (Keian 4), he assumed the rotating abbotship at Tōkai-ji Temple in Shinagawa, which had been established by Takuan.

His posthumous Buddhist title was Daikō Chikai Zenji.