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Usuki Kō Lighthouse

LFl White 8s🇯🇵Usuki, JPOperational

Location & Light Range

About Usuki Kō Lighthouse

Usuki Kō lighthouse is a white, cylindrical concrete structure standing 9.5 meters tall, situated at the extremity of Usuki Port's main breakwater. Its equipment room is a single-story concrete building of square design. First lit in 1939, the lighthouse emits a long white flash every 8 seconds. The focal height of its light is 12 meters, providing a geographic range of 11 nautical miles. The site is accessible to the public, though the tower itself is closed.

Why it matters: This lighthouse is essential for guiding vessels into Usuki Port, preventing groundings and collisions at the busy harbor entrance.

Light & Optic

Characteristic Signature
LFl White 8s
Flash Type
Long Flash
Light Color
White
Interval
8s
Raw Code
LFl W 8s
Focal Height
12m
Geographic Range
11NM

Construction & History

First Lit
1939

Significant events: station established 1939

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: A 9.5m concrete post attached to a square 1-story concrete equipment room. The entire lighthouse is white.

Location

City
Usuki
Country
🇯🇵Japan
Region
Oita Prefecture
Sea Region
Usuki Port, at the end of the main breakwater
Latitude
33.1273°
Longitude
131.8148°

References & Identifiers

Nearest Port
Usuki(0.0 km)
Admiralty No.
M4941
NGA No.
10564
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Frequently Asked Questions

How do mariners identify Usuki Kō Lighthouse at night?+
Usuki Kō displays the characteristic LFl White 8s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Usuki Kō Lighthouse guide vessels into?+
Usuki Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Usuki at 0.2 NM to the W. Other ports served include Tsukumi (3.9 NM SE), Saganoseki (7.6 NM NNE), Saiki (10.2 NM SSE), Oita (10.5 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Usuki Kō Lighthouse still active and maintained?+
Yes, Usuki Kō 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 Lighthouse?+
Usuki Kō 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 Lighthouse?+
You can track vessels near Usuki Kō 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.