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Ogaki Kō Lighthouse

Fl Green 3s🇯🇵Etajima, JPOperational

Location & Light Range

About Ogaki Kō Lighthouse

Also known as: Ogaki Kō (Nomishima)

This 9-meter cylindrical concrete lighthouse was built and first lit in 1965. It stands on a breakwater that shelters the harbor of Ogaki, on Etajima island's east coast, south of Kakiura. The structure consists of a white concrete post attached to a 1-story equipment shelter. It emits a single green flash every 3 seconds. The light has a geographic range of 10.7 nautical miles. The site is open to the public, but the tower is closed.

Why it matters: The lighthouse is indispensable for the safe operation of Ogaki Harbor, directly guiding vessels through its entrance. Its green flash helps mariners distinguish this specific harbor approach from other lights along the Etajima coastline.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

Year Built
1965

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

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

Location

City
Etajima
Country
🇯🇵Japan
Region
Hiroshima Prefecture
Sea Region
East coast of Etajima, on a breakwater sheltering the harbor of Ogaki, just south of Kakiura.
Latitude
34.1762°
Longitude
132.4772°

References & Identifiers

Nearest Port
Etajima(1.2 km)
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Frequently Asked Questions

How do mariners identify Ogaki Kō Lighthouse at night?+
Ogaki Kō displays the characteristic Fl Green 3s. 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 Ogaki Kō Lighthouse guide vessels into?+
Ogaki Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Kanokawa at 2 NM to the WNW. Other ports served include Mitsukoshima (2 NM ENE), Ryohshida (2.5 NM SSE), Okunouchi (2.8 NM ESE), Hatami (3.4 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ogaki Kō Lighthouse still active and maintained?+
Yes, Ogaki 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 Ogaki Kō Lighthouse?+
Ogaki 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 Ogaki Kō Lighthouse?+
You can track vessels near Ogaki 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.