Uyama, Takuei (23 Oct 2019). "天皇はなぜ「王(キング)」ではなく「皇帝(エンペラー)」なのか" [The Title of the Monarch of Japan: not the "King" but the "Emperor"] (باليابانية). Archived from the original on 2021-10-07. Retrieved 2019-10-23.
Uyama, Takuei (23 Oct 2019). "天皇はなぜ「王(キング)」ではなく「皇帝(エンペラー)」なのか" [The Title of the Monarch of Japan: not the "King" but the "Emperor"] (باليابانية). Archived from the original on 2021-10-07. Retrieved 2019-10-23.