Columbia subject headings:
Buddhist legends--Japan.
Keikai, active 8th century-9th century. Nihon ryōiki.
Harvard subject headings:
Buddhist legends--Japan.
Keikai, active 8th century-9th century. Nihon ryōiki.
Princeton subject headings:
Buddhist legends--History and criticism.
Keikai, active 8th century-9th century. Nihon ryōiki.