Nippara Limestone Cave (日原鍾乳洞)

Nippara Limestone Cave

Nippara Limestone Cave (日原鍾乳洞) is one of the largest limestone caves in the Kanto region, located in Okutama in Tokyo's Nishitama District.

Bridge over Nippara River leading to the cave entrance

Once a sacred site for mountain worship, it has become one of the area's main tourist attractions. The entrance is situated beside a tributary of the Nippara River. Inside, the temperature remains a constant 11°C throughout the year — cool during summer and warm in winter.

An admission fee is required to enter the cave.

Admission fees:

• Adults: JPY 900
• Middle school students: JPY 700
• Elementary school students: JPY 600

Normal operating hours:

• April to November: 9:00 AM – 5:00 PM
• December to March: 9:00 AM – 4:30 PM
• Closed from December 30 to January 3

Tsubame-iwa

Located nearby are Tsubame-iwa (燕岩), which translates literally to "Swallow Rock," and Bonten-iwa (梵天岩), which translates literally to "Brahma (a Buddhist deity) Rock."

Bonten-iwa