Tsuzuki-Ishi is a set of stones located in Ayaori-cho, Tono City, Iwate Pref. A huge stone with a width of 7 m, a depth of 5 m and a thickness of 2 m is laid on the two supporting stones. It is on a slope in the cedar grove 15 minutes’ walk from the torii gate in Ayase Town. There are several legends and stories as to the origin of these stones, but none of them is ascertained. According to the 11th appendix of Legends of Tono, it was lifted by Yoshitsune’s retainer, Benkei. The stones are also said to be the ruin of an ancient tomb or a part of dolmen. As there has been no record about the stones, it isn’t clear how long it has been here and even whether it was part of the natural process or man-made object. As there is another huge stone located at Haguro Shrine in the nearby area, these stones might be related to it but no proof has been found. The existence of Tsuzuki-Ishi itself is a real mystery.