Iokido

Iokido, in Aki City, Kochi Prefecture, is a natural sea cave carved by wave erosion back when this whole area was sea. After passing through the cave, about five meters high and forty meters long, a mysterious gorge thick with tropical ferns spreads out beyond. It is rare for so many kinds of ferns to live together in one place, and the fern colony is designated a natural monument of Japan. The scene wrapped in moss and ferns is a healing power spot that feels just like a Ghibli world.

Highlights

- A natural sea cave about five meters high, carved by wave erosion - The fern colony, a natural monument of Japan, spreading beyond the cave - The dreamlike scenery of a gorge wrapped in moss and ferns - A sense of hidden wilderness, easily reached despite sitting along a highway

Enjoying the Seasons

From the rainy season into summer, when the ferns and moss glisten with freshness, the greenery is at its most beautiful. The inside of the cave is cool, so it stays comfortable even in summer. After rain the greenery grows even more vivid, deepening the mysterious atmosphere.

Access and Basic Information

- Location: Ioki, Aki City, Kochi Prefecture - Easy to reach from along National Route 55 - Boots are reassuring as the footing can be muddy - Guided tours are also offered by the tourism association

A Quick Tip

Since the cave and gorge are often muddy underfoot, visiting in boots or shoes that can get wet is recommended. The local association even lends out boots. Aim for the seasons when the greenery is beautiful.