Gasan Jōseki (峨山韶碩 1275–23 November 1366) was a Japanese Soto Zen monk. He was a disciple of Keizan Jokin, and his students included Bassui Tokushō, Taigen Sōshin, Tsūgen Jakurei, Mutan Sokan, Daisetsu Sōrei, and Jippō Ryōshū.

Gasan Jōseki
Wooden statue of Gasan Jōseki held at the temple Yōkōji in Ishikawa Prefecture. It is believed to have been made during the Northern and Southern Courts Period (1336-1392). It was designated an Ishikawa Prefecture Cultural Property in 1993.
TitleZen Master
Personal
Born1275
Died1366
ReligionBuddhism
SchoolSōtō
Senior posting
TeacherKeizan Jōkin
PredecessorKeizan Jōkin
SuccessorBassui Tokushō
Taigen Sōshin
Students

Later, he was designated the 2nd head of Sojiji Temple.