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Akasaki Kō Lighthouse

Oc Green 4s🇯🇵Amakusa, JPOperational

Location & Light Range

About Akasaki Kō Lighthouse

This white concrete post lighthouse was built and first lit in 1977. Standing 8.5 meters tall with a focal height of 11 meters, it is situated at the end of the east breakwater in Akasaki. The structure includes a single-story concrete equipment room. It emits a green occulting light, showing for two seconds followed by a two-second eclipse, with a geographic range of 10.7 nautical miles. The lighthouse is located on the north coast of Kami Shima, near the port of Kohtsuura.

Why it matters: This lighthouse marks the eastern breakwater, guiding vessels safely into and out of Akasaki harbor and preventing them from striking the harbor entrance structure.

Light & Optic

Characteristic Signature
Oc Green 4s
Flash Type
Occulting
Light Color
Green
Interval
4s
Raw Code
Oc G 4s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

Year Built
1977

References & Identifiers

Nearest Port
Kohtsuura(2.2 km)
Admiralty No.
M5154.7
NGA No.
11536
USCG No.
JCG-6453

Tower & Structure

Tower Height
8.5m
Tower Shape
post
Tower Color
white
Material
concrete

Structure: An 8.5m white concrete post with a 1-story concrete equipment room.

Location

City
Amakusa
Country
🇯🇵Japan
Region
Kumamoto Prefecture
Sea Region
end of the east breakwater of Akasaki, on the north coast of Kami Shima
Latitude
32.5194°
Longitude
130.3192°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Akasaki Kō Lighthouse at night?+
Akasaki Kō displays the characteristic Oc Green 4s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Akasaki Kō Lighthouse guide vessels into?+
Akasaki Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Oura/Ariake at 2.3 NM to the E. Other ports served include Shimotsuura (2.5 NM SW), Mogine (6.3 NM WSW), Yanagi (6.5 NM ENE), Nagame (6.6 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Akasaki Kō Lighthouse still active and maintained?+
Yes, Akasaki 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 Akasaki Kō Lighthouse?+
Akasaki 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 Akasaki Kō Lighthouse?+
You can track vessels near Akasaki 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.