![Grand Mercure Lake Hamana Resort & Spa [Official]| Grand Mercure Lake Hamana Resort & Spa](https://grand-mercure-lakehamana-resortandspa.jp/en/wp/wp-content/uploads/2023/10/GMH_hamanako.svg)
Ryugaiwa-dong
![Ryugaiwa-dong| Grand Mercure Lake Hamana Resort & Spa [Official]](https://grand-mercure-lakehamana-resortandspa.jp/en/wp/wp-content/uploads/2024/04/%E3%80%90%E6%B5%9C%E5%90%8D%E6%B9%96%E3%83%84%E3%83%BC%E3%83%AA%E3%82%BA%E3%83%A0%E3%83%93%E3%83%A5%E3%83%BC%E3%83%AD%E3%83%BC%E3%80%91-1600x1067.jpg)
Ryugaiwa Cave, the only limestone cave in Shizuoka Prefecture, is said to have been formed in a limestone area about 250 million years ago. The cave is an average of 18 ° C throughout the year, and it is a cool and warm nature experience spot in summer. The dynamic "Golden Otaki" with a drop of 30m is full of negative ions!
Basic information
- Address
- 〒431-2221
193 Tabata, Hisa-cho, Hamana-ku, Hamamatsu City, Shizuoka Prefecture - URL
- https://doukutu.co.jp/
- Facility name
- Ryugaiwa-dong
![[Executive Lake View Lounge] Renewal of our service](https://grand-mercure-lakehamana-resortandspa.jp/en/wp/wp-content/uploads/2025/07/018-550x320.jpg)
![[Wind the superb view of Hamanako] Executive Lakeview Lounge opens on April 1, 2025](https://grand-mercure-lakehamana-resortandspa.jp/en/wp/wp-content/uploads/2025/06/%E6%B5%9C%E5%90%8D%E6%B9%96%E3%83%A9%E3%82%A6%E3%83%B3%E3%82%B81.2-550x320.png)
