article: Kōan (Kamakura period)
links: Louis-Frédéric Kamakura period Emperor Yōzei Isaac Titsingh Emperor Go-Murakami Kōan (Muromachi period) Emperor Go-Toba Japanese era name Emperor Tenji Empress Jitō Kenji (era) Shōō (Kamakura period) H. Paul Varley Emperor Fushimi National Diet Library