It is located one kilometer east from the temple, and said to be the tumulus of Mayumi Takeyumi, or the place where Emperor Shomu's arrow was buried (A legend says part of Emperor Shomu's arrow was used to carve the head of Buddha on the head of the principal image of eleven-faced Kannon).
寺の東方1kmほどのところにあり、真弓長弓の塚とも、聖武天皇の弓を埋めたところとも伝える（伝承では聖武天皇の弓の一部を使って、本尊十一面観音の頭上の仏面を刻んだとされている）。