Keikyo hibun kenkyu. The Nestorian monument in China, (Place: Publisher, era 44 [1911]).
The Nestorian Monument in China, (London: SPCK, 1916, reprinted 1928).
The luminous religion, a study of Nestorian Christianity in China, with a translation of the inscription upon the Nestorian tablet, with Mrs. C. E. Couling, (London: Carey press, 1925).
Roma ho koyo, 1927.
Keikyo no kenkyu, (Tokyo: Toho Bunka Gakuin Tokyo Kenkyujo-- Hatsubaijo Bunkyudo Shoten, Showa 10 [1935]; reprinted Tokyo: Meicho Fukyukai, Showa 53 [1978 & 1980].
Articles in the Journal of the North China Branch of the Royal Asiatic Society from 1932 to 1936.
Nestorian Documents and Relics in China, (Tokyo: Toho bunkwa gakuin: The Academy of oriental culture, 1937; 2nd edition, Tokyo: Maruzen, 1951). An English language abridgement of Keikyo no kenkyu.
Catalogue of the Nestorian literature and relics, (Tokyo: Maruzen,1950).
Chūgoku ni okeru Keikyo suibo no rekishi, (Kyoto: Habado Enkei Doshisha Toho Bunka Koza Iinkai, Showa 30 [1955]).
Roma-teikoku Kirisutokyo hogo kitei no kenkyu. (Place: Publisher, 1957).
Saeki Yoshiro iko narabini den, (Place: Publisher, Showa 45 [1970]).