Yoshida Lava Tree Molds

Introduction

The Yoshida lava tree molds are not trees at all but cavities left by lava. When Mt. Fuji erupted in 937, the Kenmarubi flow swept through a forest and engulfed the trunks; the wood burned away and the cooling lava kept their shape, with several trees overlapping to form longer tunnels whose ribbed walls look like the inside of a body. The largest, called Yoshida Tainai, runs close to 65 metres. Together with 62 other cavities nearby it forms the Yoshida Lava Tree Mold Group, a national natural monument and, since 2013, a component of the Fujisan World Heritage listing. Fuji-ko pilgrims crawled through it as a return to the womb and a rebirth, which is where 'tainai' comes from; in 1892 the Marufuji Sooko congregation adopted this cave in place of the nearby Funatsu Tainai, and pilgrims and local oshi guides have cared for it since. The present access rules matter more than the geology: a fence closes the entrance for most of the year to protect the molds and keep visitors safe. The single day the cave opens to everyone is 29 April, the Yoshida Tainai Festival, with Shinto rites and a burning ceremony by Fuji-ko believers; on any other date a visit requires prior permission from Fujiyoshida's cultural heritage office. There is no dedicated car park. From Nakanochaya it is a thirty-minute walk along the Yoshida ascent route, so wear proper shoes. Outside the festival, arriving unannounced means seeing a fence and trees; the year-round Funatsu Tainai nearby is the practical alternative.

✨ Highlights

🛈 Practical Info