A Heian-era Japanese Buddhist monk of the Shingon school, one of the nittō hakke (入唐八家) Tang-pilgrim Japanese monks. Born 799 CE; died 852 CE.
He traveled to Tang China in 838 as part of the great Japanese embassy of that year (which also included Jōgyō 常曉 and Ennin 圓仁), returning to Japan in 839. He produced an importation catalog (KR6s0110 Yuánxíng lù, T2164) documenting the Esoteric texts and ritual materials brought back, presented to the Heian imperial court. He was subsequently a senior figure in the Shingon school’s Heian-era institutional consolidation.
Source: KR6s0110 Yuánxíng lù (T2164); standard Japanese Heian Shingon-school sources.