Tainai-kuguri(Passage through the womb)
Climbing up the mountainous road for about 300meters from The Takijiri-Oji bus stop, you will reach the Tainai-kuguri, so-called "Passage through the womb".
Walking between these huge rocks is considered a test of faith and, to ensure an easy birth delivery, because the exit of the passage is so narrow and you need to twist your body to get out of the stone hole.