Katsuura & Namegawa · Japan · Wall · Reef
Uhara-jima
A maze of ledges where bullhead sharks rest
Uhara-jima is a boat point on the east side of Uhara Island, close to the harbour and sheltered from south winds. Almost no current reaches it, so newer divers can explore a rock reef of walls, shelves and crevasses, where bullhead sharks are often found and frogfish and lumpfish hide.
Also known as Uhara Island.
Where it is and how deep
35.1281° N, 140.2786° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The island's reef forms a wall from 5 m down to 25 m, broken by shelves, cracks and patches of sand. The top of the reef is a tangle of rock like a maze; divers who lose their way head east, which leads off the reef.
Bullhead sharks are found often on the walls and on the shelves over the reef top. Frogfish live here too, and from winter into spring lumpfish turn up as well.
Marine life and season
- Frogfish
- Macro critters
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prime | Prime | Prime | Good | Good | Good | Good | Good | Good | Good | Good | Prime |
Season follows Katsuura & Namegawa: Diving runs all year; winter opens Umanose and brings lumpfish onto the sand, in the coldest water of the year.
Questions divers ask
Is Uhara-jima suitable for newer divers?+
Yes. It is 3 minutes by boat from the harbour, gets almost no current, and the walls run from 5 m to 25 m.
Sources
- 鵜原島 (Katsuura Diving Service) — 勝浦ダイビングサービス
- Katsuura diving point list — 勝浦ダイビングサービス
- 鵜原島 (OpenStreetMap) — OpenStreetMap
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