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Usuki Kō North Breakwater Lighthouse

Fl Red 3s🇯🇵Usuki, JPOperational

Location & Light Range

About Usuki Kō North Breakwater Lighthouse

This red, 7-meter tripod lighthouse marks the end of Usuki's detached north breakwater. The structure consists of a tripod mounted on a round, single-story concrete equipment shelter, with the entire construction painted red. It provides a focal height of 8 meters above the water. The light emits a single red flash every three seconds, offering a geographic range of 9.7 nautical miles. The lighthouse is located 0.2 kilometers from the nearest port, Usuki. While the site is accessible, the tower itself is closed to the public.

Why it matters: This lighthouse is essential for maritime safety in Usuki Bay, specifically warning vessels about the end of the detached north breakwater. Its distinctive red light guides ships into the harbor, preventing groundings or collisions in this busy shipping lane.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
8m
Geographic Range
9.7NM

Location

City
Usuki
Country
🇯🇵Japan
Region
Oita Prefecture
Sea Region
Located at the end of the detached north breakwater at Usuki, Japan.
Latitude
33.1298°
Longitude
131.8114°

References & Identifiers

Nearest Port
Usuki(0.2 km)
Admiralty No.
M4940
NGA No.
10560

Tower & Structure

Tower Height
7m
Tower Shape
tripod
Tower Color
red
Material
concrete

Structure: A 7m tripod structure mounted on a round 1-story concrete equipment shelter, entirely painted red.

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Usuki Kō North Breakwater Lighthouse at night?+
Usuki Kō North Breakwater displays the characteristic Fl Red 3s. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Usuki Kō North Breakwater Lighthouse guide vessels into?+
Usuki Kō North Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Usuki at 0.2 NM to the SSW. Other ports served include Tsukumi (4.1 NM SE), Saganoseki (7.6 NM NNE), Oita (10.2 NM NW), Saiki (10.5 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Usuki Kō North Breakwater Lighthouse still active and maintained?+
Yes, Usuki Kō North Breakwater Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
What shipping routes pass near Usuki Kō North Breakwater Lighthouse?+
Usuki Kō North Breakwater Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Usuki Kō North Breakwater Lighthouse?+
You can track vessels near Usuki Kō North Breakwater Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.