The stone monument at Dogo hot spring was constructed in 596 but the monument is ruined now. The inscription is quoted in the "Shoku Nihongi" and originally contained in the "Iyo Fudoki".'
「道後温泉碑　推古天皇の四年に建てたもので碑は今日亡びてない。文は『續日本紀』に引く所にして、もと『伊豫風土記』に載せてあつた。」