1. Nihon Shoki (The Chronicles of Japan, first national history), around 720, reprinted edition: Kokushi-Taikei 1–2 Nihon-Shoki, (1967), Yoshikawakoubunkan, p. 273. (in Japanese)
2. Nihon Shoki, (The Chronicles of Japan, first national history), around 720, reprinted edition: Kokushi-Taikei 1–2 Nihon-Shoki, (1967), Yoshikawakoubunkan, p. 299. (in Japanese)
3. Crasset RP, Histoire de l’Eglise du Japon/par le R. P. Crasset de la Compagnie de Jesus. – Seconde ed. – A Paris : Chez Francois Montalant, 1715. Nihon- Seikyou-shi 1, p. 177, Hakubunsya, Tokyo, 1878, National Diet Library Collection. (in Japanese)
4. Nihon Shoki, (The Chronicles of Japan, first national history), around 720, reprinted edition: Kokushi-Taikei 1–2 Nihon-Shoki, (1967), Yoshikawakoubunkan, p. 268, 291. (in Japanese)
5. Konjyaku-Monogatari-syu, compiled in the late Heian Period, reprinted edition: Kokushi-Taikei 17 Konjyaku-Monogatari, (1967), Yoshikawakoubunkan, pp. 641–642. (in Japanese)