Timeline
03:16
Arrive at Ryugashi Cavern before it opens. The cavern stays about 15°C year-round, making it a great place to cool off, but the first 400 m of the 1000-m limestone cavern are only open to the public starting at 09:00. Use this early morning quiet time to admire the exterior and prepare for the stalactites and stalagmites inside.
04:46
Enter the cavern at sunrise. While the sun rises toward the WNW, the interior experience is independent of the sky, but the cool 15°C air will feel particularly crisp against the morning chill. Witness the centerpiece 30-m underground waterfall in the dim, cool light.
06:16
Finish your tour of the open section. The central bus station is the reference point for getting here, so plan your return transport accordingly. Check the route for the bus to Okuyama from Ryugashi-do Iriguchi.
06:46
Head back toward the central bus station area for breakfast. Since there are no specific food or drink shops listed in the immediate vicinity of the cavern in the provided data, check the route from Ryugashi-do Iriguchi to the central bus station and look for local eateries that open around 09:00 to enjoy a post-cavern meal.
Local tip
The cavern is open 09:00-17:00. In July, sunrise is early at 04:46, so arriving 90 minutes before the moment means arriving well before opening. The 15°C interior is a welcome relief from the sweltering summer heat outside.
Check before you go
- Ryugashi Cavern opens at 09:00. Plan to arrive earlier to wait for the doors or enjoy the exterior.
- Check the bus route from Ryugashi-do Iriguchi to the central bus station for your return trip.
- Adults admission is ¥650, children 13-15 ¥450, children under 13 ¥350.
Built from places in the Wikivoyage guide to Hamamatsu (CC BY-SA 4.0), with open map data from OpenStreetMap contributors (ODbL).