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Chichibu-Tama-Kai NP, Tokyo
Claim this place to tell your story your way.
Nippara’s slender “walking stick,” Kongo-tsue, is about 2.5 metres tall. Geologists estimate it took more than 32,000 years to grow—one stone column with a very long story.
A Tōkai University student expedition discovered Nippara’s “new cave” in 1962, remarkably untouched. Its entrance, Matsumae-guchi, honors the university’s president at the time, Shigeyoshi Matsumae.
At nearby Ichiseki-yama Shrine, the local lion dance is still performed for the shrine festival. Town tradition traces it to 1612, when a monk is said to have brought 3 lion heads and 48 ritual wands from Mount Haguro.
Coins and bronze mirrors recovered from the cave are now officially listed as Okutama Town cultural property. A local history account identifies imported Song- and Ming-era coins among the finds, alongside Japanese cash coins.
Researchers measured a seasonal reversal in Nippara’s cave breeze: in winter, outside air rushes inward and can be felt about 60 metres inside; during most other seasons, the prevailing flow is outward.
Nippara was revered as Ichiseki-yama Daigongen, a sacred place for mountain ascetics. One chamber is traditionally said to have been a practice site for Kōbō Daishi, the Buddhist monk also known as Kūkai.
Listen for the cave’s suikinkutsu: water drips into a buried vessel and makes a delicate, resonant sound. The musical feature was installed in August 1996, adding an unexpected note to this underground world.
Nippara’s old cave runs mostly horizontally; its wall ridges preserve clues to an ancient groundwater level. The newer, steeply rising section is a different world, with the stalagmites and columns the cave is famous for.
