It is said that Koreeda Sengame (1821–1881) discovered this natural spring. Lady Sengame, who was originally a religious leader from Komatsubara in Kagoshima City, came to live on Yakushima with her family in 1868 (Meiji 1), eventually settling in Issou.
In her later years, Lady Sengame was very active in proselytizing for the Jōdo Shinshū sect of Pure Land Buddhism, and in fact kicked the bucket in Nagata village one day whilst spreading the gospel, so to speak.
It is said that Lady Sengame also had particular talent as a human dowsing rod. Besides Sengame’s Well, she also discovered the Cold Spring of Ōura, another natural wellspring in Issou.