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Tanasoko Kō Lighthouse

Fl Green 4s🇯🇵Amakusa, JPOperational

Location & Light Range

About Tanasoko Kō Lighthouse

Also known as: Tanasoko Kō (Akebono Breakwater)

Built in 1971, this lighthouse is an 8.5-meter white concrete post topped with a lantern. It is attached to a single-story concrete equipment shelter and stands at the end of the south breakwater. The structure serves the Tanasoko harbor, located in Amakusa within Japan's Kumamoto Prefecture. Its focal height reaches 11 meters, and it emits a green light that flashes every four seconds. This navigational aid extends into the sea, marking the harbor's entrance and providing a geographic range of 10.7 nautical miles.

Why it matters: This lighthouse is essential for guiding vessels into Tanasoko harbor, clearly marking the extremity of the south breakwater and facilitating safe entry for local fishing boats and other small craft.

Light & Optic

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

Construction & History

Year Built
1971

References & Identifiers

Nearest Port
Tanasoko(0.3 km)
Admiralty No.
M5155.4
NGA No.
11252
ARLHS No.
JPN-2111

Tower & Structure

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

Structure: An 8.5m white concrete post with a lantern, attached to a square 1-story concrete equipment shelter.

Location

City
Amakusa
Country
🇯🇵Japan
Region
Kumamoto Prefecture
Sea Region
Tanasoko harbor, at the end of the south breakwater.
Latitude
32.4058°
Longitude
130.3395°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Tanasoko Kō Lighthouse at night?+
Tanasoko Kō displays the characteristic Fl 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 Tanasoko Kō Lighthouse guide vessels into?+
Tanasoko Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Tanasoko at 0.1 NM to the E. Other ports served include Himedo (4.3 NM ENE), Nagame (4.9 NM ENE), Shimotsuura (5.6 NM NNW), Amatsuke (6.1 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tanasoko Kō Lighthouse still active and maintained?+
Yes, Tanasoko 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 Tanasoko Kō Lighthouse?+
Tanasoko 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 Tanasoko Kō Lighthouse?+
You can track vessels near Tanasoko 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.