Ako Kō Outer Breakwater Lighthouse
Fl White 3s🇯🇵Tokyo, JPOperational
Location & Light Range
About Ako Kō Outer Breakwater Lighthouse
This concrete lighthouse, built in 1987, stands on the main breakwater at the entrance to Ako harbor, Japan. The cylindrical tower measures 10 meters tall and is painted white. It features a flared top and emits a white flash every three seconds. The focal height of the light is 16 meters, providing a geographic range of 12.2 nautical miles. The site is accessible to the public, though the tower itself remains closed.
Why it matters: The lighthouse marks the end of the main breakwater, a hazard to navigation, and is essential for vessels entering and exiting Ako harbor.
Light & Optic
Characteristic Signature
Fl White 3s
- Flash Type
- Flashing
- Light Color
- White
- Interval
- 3s
- Raw Code
- Fl W 3s
- Focal Height
- 16m
- Geographic Range
- 12.2NM
Construction & History
- Year Built
- 1987
Visiting
- Open to public
- Site open, tower closed
Nearby Vessels
Tower & Structure
- Tower Height
- 10m
- Tower Shape
- cylindrical
- Tower Color
- white
- Material
- concrete
Structure: round concrete tower with a flared top
Location
- City
- Tokyo
- Country
- 🇯🇵Japan
- Region
- Miyake Subprefecture
- Sea Region
- Ako harbor, Japan, marking the end of the main breakwater.
- Latitude
- 34.0685°
- Longitude
- 139.4796°
References & Identifiers
- Nearest Port
- Mikurajima(11.6 km)
- Admiralty No.
- M6276.3
- NGA No.
- 4938
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