Ryugukutsu Sea Cave
In Japanese: 龍宮窟
A sea cave near Shimoda whose roof has collapsed, leaving a skylight 40–50 m across. From the path above, the opening looks like a heart.
Izu Peninsula Geopark
Nearby
- Perry Road (Shimoda) ≈ 20 min by car
- Shimoda Park (Shimoda Castle Ruins) ≈ 20 min by car
- Cape Tsumeki ≈ 25 min by car
- Cape Irozaki ≈ 25 min by car
- Kawazu Cherry Blossoms ≈ 35 min by car
Travel times are rough estimates by car.
- Getting there
- Tokai Bus (for Toji) from Izukyu-Shimoda Sta. to Ryugukutsu, about 20 min, 3 min walk
- Fee
- Free
- Good to know
- Car park 500 yen (1,500 yen in summer); rough footing inside
- Time needed
- 40 min
Checked against the official Japanese website on 2026-10-12. Report outdated info