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Yanai Kō Lighthouse

Fl (2) Red 6s🇯🇵Yanai, JPOperational

Location & Light Range

About Yanai Kō Lighthouse

Also known as: Yanai Kō (Outer Breakwater)

This 9-meter cylindrical concrete lighthouse is situated at the west end of a detached breakwater protecting Yanai harbor. It features a square, one-story concrete equipment shelter and is painted red. The light emits a single red flash every 6 seconds. The tower itself is closed to the public, but the site is accessible by boat. This structure guides vessels approaching and departing the port, warning them of the breakwater's limits.

Why it matters: Yanai Kō warns vessels of the western end of the detached breakwater, ensuring safe entry and exit from Yanai harbor.

Light & Optic

Characteristic Signature
Fl (2) Red 6s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
6s
Raw Code
Fl R 6s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Yanai
Country
🇯🇵Japan
Region
Yamaguchi Prefecture
Sea Region
Located at the west end of a detached breakwater off Yanai harbor.
Latitude
33.9531°
Longitude
132.1373°

References & Identifiers

Nearest Port
Yanai(0.3 km)
ARLHS No.
JPN-1675

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: A 9m cylindrical concrete post with a square 1-story concrete equipment shelter, 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 Yanai Kō Lighthouse at night?+
Yanai Kō displays the characteristic Fl (2) Red 6s — 2 red flashes every 6 seconds. 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 Yanai Kō Lighthouse guide vessels into?+
Yanai Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Hirao at 0.3 NM to the SW. Other ports served include Yanai (0.5 NM WSW), Kuka (6.1 NM E), Tsuzu Yamaguchi (6.6 NM NNE), Hikari (10.3 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yanai Kō Lighthouse still active and maintained?+
Yes, Yanai 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 Yanai Kō Lighthouse?+
Yanai 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 Yanai Kō Lighthouse?+
You can track vessels near Yanai 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.