This monument represents the remains of Bakko Ishi (Bakko Stone).
Bakko Ishi is said to be a grave of Ohmachiko, who was Komachi’s mother. Siddhaṃ letters are carved on some of those actual stones.
Ohmachiko died when Komachi was very young; therefore, Komachi was raised by a foster mother, who came from Kyoto. The foster mother taught Komachi poems, Kyoto dialect, and manners, and Komachi’s talents and beauty were refined.