Nichiin (日印, 1264 – January 20, 1329) was one of Nichirō's nine senior disciples (not to be confused with the six senior disciples of Nichiren). Along with his own disciple Nichijin (日陣) he is considered the founder of the Hokkeshū Jinmon Ryū subsect of Nichiren Buddhism.

Nichiin
日印
Personal
Born1264
Died1329
ReligionBuddhism
SchoolNichiren Buddhism
SectNichiren-shū
Hokkeshū Jinmon Ryū
Senior posting
TeacherNichirō
Students

He was born in Teradomari in Echigo. He became a Tendai priest at the age of 8 and was sent to Kyoto at 16. He famously won a debate against Pure Land Buddhists in 1319, and announced the Jinmon Ryū sect on October 12, 1321.