Koho Hakugan

Koho Hakugan (孤峰白岩, dates uncertain) was a Japanese Sōtō Zen master whose name appears in the lineage records of the Sōtōshū, associated with the transmission line descending from the major Edo-period Sōtō reformers. The name *Kohō* ("lone peak") is a dharma name in the classical Chinese tradition, and *Hakugan* ("white cliff") designates his temple designation or honorific^[1]. His position in the lineage chart places him in the post-Gesshū Sōko reform movement that sought to restore a stricter fidelity to Dōgen's monastic code and the Shōbōgenzō in the eighteenth century^[1][2].

Hakugan contributed to the written liturgical and textual tradition of the Sōtō school: he is recorded as author of a preface to the *Taiso Butsuji kōshiki*, a ritual text for ancestor veneration ceremonies that remains part of the Sōtō liturgical repertoire. This involvement in kōshiki composition places him in the line of scholar-monks who maintained the elaborate ritual structure of the Sōtō institution during the Edo period alongside the contemplative and scriptural reform movement^[2].