found: His The Tantric ritual of Japan, 1991:title page (Richard Karl Payne) jacket (Richard K. Payne, doctorate in the history and phenomenology of religion, Graduate Theological Union, 1985; teaches at the Institute of Buddhist Studies)
found: Re-visioning "Kamakura" Buddhism, 1998:CIP title page (Richard K. Payne) data sheet (b. 1949)
found: Discourse and ideology in medieval Japanese Buddhism, 2005:ECIP data view (Payne, Richard K; b. 11/08/49)
found: Language in the Buddhist Tantra of Japan, 2018:ECIP title page (Richard K. Payne)
found: E-mail from publisher, September 10, 2018(preferred name is Richard K. Payne)