Yoshimi Hyakuana Caves

This nationally designated historic site contains 219 horizontal tombs cut into tuff in the late Kofun period. Luminous moss grows within some caves, and tunnels dug for a wartime factory remain at the site. Nearby Iwamuro Kannon Hall makes another interesting stop.

Plan your visit

Getting there

Bus from Higashi-Matsuyama Station (Tobu Tojo Line) to Hyakuana Iriguchi, then 5 min on foot

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From Tokyo Station

About 100–130 minTokyo Station → JR Yamanote Line to Ikebukuro → Tobu Tojo Line to Higashi-Matsuyama → Kawagoe Kanko bus to Hyakuana-iriguchi → about 5 min on foot to the cave-site entrance

An estimate for the transport shown, including transfers and walking. Waiting times and congestion vary; check a route for your departure time.

Public transport route↗

Access and booking checked Sep 12, 2026

Opening hours

8:45–16:50, last entry 16:30; open daily. The underground wartime factory interior is closed for inspection and investigation.

Admission

Junior high school age and above ¥300; elementary pupils ¥200; younger children free.

Time to enjoy

1 hour

Best time

Year-round

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Opening hours and events may change. Please check the latest details before visiting.

Reference photo and illustration

AI-generated illustration based on a photograph, with reinterpreted colors and details.

Yoshimi Hyakuana, gaikan-1.jpg — Saigen Jiro · CC0