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Tokonami Kō Lighthouse

Oc Red 4s🇯🇵Ube, JPOperational

Location & Light Range

About Tokonami Kō Lighthouse

A 9-meter red concrete post joined to a square 1-story concrete equipment room marks the south breakwater of Tokonami harbor. Located east of Ube Airport in Yamaguchi Prefecture, the structure's light is occulting red for 4 seconds (Oc R 4s). Its focal height reaches 12 meters, with a geographic range covering 11 nautical miles. The site is open to visitors, but the tower is not. It is situated near the port of Maruo, at a distance of 2.8 kilometers.

Why it matters: The red light serves as a navigation aid, marking the south breakwater for vessels approaching Tokonami harbor.

Light & Optic

Characteristic Signature
Oc Red 4s
Flash Type
Occulting
Light Color
Red
Interval
4s
Raw Code
Oc R 4s
Focal Height
12m
Geographic Range
11NM

Location

City
Ube
Country
🇯🇵Japan
Region
Yamaguchi Prefecture
Sea Region
south breakwater of Tokonami harbor, a short distance east of Ube Airport
Latitude
33.9486°
Longitude
131.3049°

References & Identifiers

Nearest Port
Maruo(2.8 km)
Admiralty No.
M5387.5
NGA No.
9632
ARLHS No.
JPN-1667

Tower & Structure

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

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

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 Tokonami Kō Lighthouse at night?+
Tokonami Kō displays the characteristic Oc Red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Tokonami Kō Lighthouse guide vessels into?+
Tokonami Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Maruo at 2.7 NM to the ENE. Other ports served include Ube (3 NM W), Aio (6.8 NM ENE), Onoda (7.1 NM W), Asa (8.9 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tokonami Kō Lighthouse still active and maintained?+
Yes, Tokonami 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 Tokonami Kō Lighthouse?+
Tokonami 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 Tokonami Kō Lighthouse?+
You can track vessels near Tokonami 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.