Sōtō Zen crest.
Own work using: Ryosoki – SOTO MISSION OF AIEA, TEACHERS ZEN LINEAGE / GTZWT (greattreetemple.org), Tenpyozan 天平山禅堂, A WESTERN SOTO ZEN BUDDHIST STATEMENT ON THE CLIMATE CRISIS / James Ford (patheos.com)
Sozen-jin