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Sumoto Kō Lighthouse

Fl Green 4s🇯🇵Amakusa, JPOperational

Location & Light Range

About Sumoto Kō Lighthouse

Sumoto Kō Lighthouse is a 9-meter white concrete post erected in 1982. It is attached to a 1-story concrete equipment shelter and stands at the end of Sumoto Harbor's west breakwater. The lighthouse emits a single green flash every 4 seconds, visible for nearly 11 nautical miles. Its focal height is 11 meters above the water. This structure serves as a navigational aid within Amakusa city.

Why it matters: The green light clearly marks the termination of the west breakwater, guiding maritime traffic safely into and out of Sumoto Harbor. Its presence helps prevent groundings within the busy port entrance.

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
1982

References & Identifiers

Nearest Port
Tanasoko(3.5 km)
Admiralty No.
M5138.4
NGA No.
11412

Tower & Structure

Tower Height
9m
Tower Shape
round
Tower Color
white
Material
concrete

Structure: A 9m white concrete post attached to a square 1-story concrete equipment shelter.

Location

City
Amakusa
Country
🇯🇵Japan
Region
Kumamoto Prefecture
Sea Region
Sumoto Harbor, marking the end of its west breakwater
Latitude
32.4094°
Longitude
130.2754°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Sumoto Kō Lighthouse at night?+
Sumoto 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 Sumoto Kō Lighthouse guide vessels into?+
Sumoto Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Amatsuke at 3.2 NM to the WSW. Other ports served include Tanasoko (3.4 NM E), Hondo (4.6 NM NW), Shimotsuura (4.7 NM N), Mogine (5.3 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sumoto Kō Lighthouse still active and maintained?+
Yes, Sumoto 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 Sumoto Kō Lighthouse?+
Sumoto 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 Sumoto Kō Lighthouse?+
You can track vessels near Sumoto 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.