stone marker for hundred-times worship
A stone placed at temples or shrines, used as a marker for the practice of 百度参り (hyakudo-mairi), where worshippers walk back and forth a hundred times while praying.
See also: 百度参り (ひゃくどまいり)
A hyakudo-ishi stands in the temple grounds.
It is said that if you walk around the hyakudo-ishi a hundred times, your wish will come true.
Compound of 百度 (hyakudo, 'hundred times') and 石 (ishi, 'stone'). The term directly describes a stone used in the hundred-times worship ritual.