Local Secret · Akiruno / Yozawa

Otake Limestone Cave 大岳鍾乳洞

Tight, adventurous limestone cave at the foot of Mt. Otake, with illuminated stalactites and crawl-through passages.

Hours9:00-16:00 (schedule irregular; confirm before visiting)

ClosedThursdays and irregular days

PriceAdult: ¥700

Getting thereMusashi-Itsukaichi Station (JR Itsukaichi Line), Nishi Tokyo bus to Otake Shonyudo Iriguchi, then about 30 min walk

Time needed1-1.5 hours

Best timeSummer (cool inside); autumn for the valley colours

Address1587 Yozawa, Akiruno, Tokyo

Websiteootakecave.com

About

Otake Limestone Cave runs about 300 m into the mountain below Mt. Otake and is a Tokyo-designated natural monument. Unlike larger show caves, it has narrow, low passages where visitors stoop and squeeze between formations, helped by borrowed helmets. A campsite and the Yozawa valley stream sit outside, and the cave stays cool in summer.

Highlights

Narrow passages with stalactites and flowstone
Helmet loan for the tight sections
Tokyo natural monument
Riverside campsite nearby

Tips

Wear clothes you do not mind getting dirty
Opening days are irregular; check the website or call
Not suitable for people who dislike tight spaces

Open in Google Maps · Info checked 2026-10-10

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Otake Limestone Cave 大岳鍾乳洞

About

Highlights

Tips

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