1. A stone placed at the point of junction of a path of stepping stones. It is usually tastefully chosen, and a little bit larger than the other stones for ease of movement.
2. The third stone from the shoe-removing stone. It is so named because the stepping stones start from this stone.
Japanese Garden Dictionary: A Glossary for Japanese Gardens and Their History
(C) 2010 by Ono Kenkichi and Walter Edwards. All rights reserved.