Tonaki Shima Lighthouse
Location & Light Range
About Tonaki Shima Lighthouse
A square cylindrical concrete tower painted white, Tonaki Shima Lighthouse stands 10.5 meters tall with its light positioned 15 meters above the water. It was first lit in 1978, emitting an isophase white light that cycles every 8 seconds. The lighthouse is situated on the waterfront on the northwestern side of Tonaki Island. This island lies about 50 km west-northwest of Naha and 25 km south of Aguni Shima. The site is open to the public, though the tower itself is closed.
Why it matters: This lighthouse aids navigation around the remote island, particularly for the ferry service connecting Tonaki to Naha and for local fishing fleets. It marks the northwestern approach to the island, helping mariners avoid hazards.
Light & Optic
- Flash Type
- Isophase
- Light Color
- White
- Interval
- 8s
- Raw Code
- Iso W 8s
- Focal Height
- 15m
- Geographic Range
- 11.9NM
Construction & History
- Year Built
- 1978
Visiting
- Open to public
- Site open, tower closed
Nearby Vessels
Tower & Structure
- Tower Height
- 10.5m
- Tower Shape
- cylindrical
- Tower Color
- white
- Material
- concrete
Structure: square cylindrical concrete tower
Location
- City
- Tonaki
- Country
- 🇯🇵Japan
- Region
- Okinawa Prefecture
- Sea Region
- Located on the waterfront of Tonaki, on the northwestern side of the island. Tonaki Shima is about 50 km west northwest of Naha and 25 km south of Aguni Shima.
- Latitude
- 26.3725°
- Longitude
- 127.1410°
References & Identifiers
- Nearest Port
- Zamami(12.4 km)
- ARLHS No.
- JPN-670
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