This is a historic dive site that represents Higashi-Izu. It can be accessed from the Tokyo area in about 2 hours, and it is also possible to take a day trip, making it a popular spot, especially among Kanto divers.
It is the only inhabited remote island in Shizuoka Prefecture, about 10 km off the coast of Atami, which can be reached in 30 minutes by ferry. After crossing the island, you can go beach diving or boat diving.
Kosoga Cave in Atami, Shizuoka, is open Nov–Apr and features a 40m semi-enclosed cave at 6–12m depth, ideal for beginners. Its wide space and open ceiling let sunlight create a stunning blue gradation. Just 10 minutes by boat from Atami Port, it’s both scenic and accessible.
Located near Atami’s wreck, this dive site has fixed buoys with depths from 18-20m below the buoy. West side (No.1 root) stays ~20m deep; east side (No.2 root) deepens to 30m. Strong currents, rich fish schools, and varied terrain make it popular.
| Monday | 09:00 - 18:00 |
| Tuesday | 09:00 - 18:00 |
| Wednesday | 09:00 - 18:00 |
| Thursday | 09:00 - 18:00 |
| Friday | 09:00 - 18:00 |
| Saturday | 08:00 - 18:00 |
| Sunday | 08:00 - 18:00 |
関東最大の沈船ダイビングができます! 期間限定ポイント小曾我洞窟!11月1日~4月末日まで!
+8155782 7285 Website| Monday | 09:00 - 18:00 |
| Tuesday | 09:00 - 18:00 |
| Wednesday | 09:00 - 18:00 |
| Thursday | 09:00 - 18:00 |
| Friday | 09:00 - 18:00 |
| Saturday | 08:00 - 18:00 |
| Sunday | 08:00 - 18:00 |
関東最大の沈船ダイビングができます! 期間限定ポイント小曾我洞窟!11月1日~4月末日まで!