Chusonji is a famous temple in Hiraizumi, about 40 minutes south of Kitakami by car or train. It is most famous for the large main hall and the opulent Konjikido (golden hall) covered in gold leaf and mother-of-pearl inlay.
Less well known are the dozens of smaller halls and shrines dotting the grounds. In many places, any horizontal surface has pebbles piled on it. The piling of stones seems to be a sort of prayer enhancement: you make your prayer, then stack stones up towards the heavens. The higher you can stack them, the better.