His The Islamic history of the Maldive Islands, c1982
東洋史専攻
EDSRC:A chronicle of the Rasūlid dynasty of Yemen : from the unique MS Paris No. Arabe 4609 / edited, notes and indices by Hikoichi Yajima (Institute for the Study of Languages and Cultures of Asia and Africa, Tokyo Gaikokugo Daigaku,1976)
EDSRC:아시아의 바다와 일본 / 오모토 케이이치 외 엮은이 ; 김숙이 옮은이 (다리미디어, 2005.12)