Calligraphy of Waka Poem, entitled "This mind is Buddha" and composed by Zen Master Dōgen

Daien Buttsū (?-1825) was a Sōtō Zen monk of the late Edo period. He lived at Eishōji Temple in Yamashiro and left in Bunsei 5 (1822) to open Kōmyōji Temple in Settsu. He called the place where he lived in seclusion “Hekigankutsu” and was called “Tora (Tiger) Buttsū”. He was known as one of the four monks for their extremely harsh Zen style, along with “Gyū (caw) Monkō”, “Ōkami (wolf) Genrō”, and “Shishi (Lion) Reitan”.

Buttsū was fond of writing Dōgen’s words. This Calligraphy is excerpted from a Japanese Poem of Waka composed by Dōgen.