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Kōzushima Kō Lighthouse

F Red 5s🇯🇵Tokyo, JPOperational

Location & Light Range

About Kōzushima Kō Lighthouse

Established in 1970, this lighthouse guides vessels into Kōzushima Kō, a port on the west side of Kōzu Shima. The current structure is an octagonal pyramidal concrete tower painted red, standing 10 meters tall. It replaced an earlier tower, with the station's original light updated after 2007. The focal height reaches 11 meters, and its geographic range is 10.7 nautical miles. The light emits a single red flash every five seconds, illuminating the entrance to the port. The site is open to the public, though the tower itself is not accessible.

Why it matters: This lighthouse is indispensable for maritime traffic navigating into Kōzushima Kō, a critical harbor for the island's economy and connectivity, specifically guiding vessels through the jetty entrance.

Light & Optic

Characteristic Signature
F Red 5s
Flash Type
Fixed
Light Color
Red
Interval
5s
Raw Code
F.Fl R 5s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

First Lit
1970

Significant events: Station established 1970, original light replaced after 2007

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
octagonal
Tower Color
red
Material
concrete

Structure: octagonal pyramidal concrete tower

Location

City
Tokyo
Country
🇯🇵Japan
Region
Oshima Subprefecture
Sea Region
end of the jetty at Kōzushima Kō, a port on the west side of Kōzu Shima
Latitude
34.2091°
Longitude
139.1273°

References & Identifiers

Nearest Port
Shikinejima(8.8 km)
Admiralty No.
M6274.4
NGA No.
5568
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Frequently Asked Questions

How do mariners identify Kōzushima Kō Lighthouse at night?+
Kōzushima Kō displays the characteristic F Red 5s. 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 Kōzushima Kō Lighthouse guide vessels into?+
Kōzushima Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Toshima/Tokyo at 19.7 NM to the NNE. Other ports served include Shimoda, Shizuoka (28.9 NM NNW), Inatori (34.1 NM N), Okada (37.2 NM NNE), Nishitokyo (37.3 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kōzushima Kō Lighthouse still active and maintained?+
Yes, Kōzushima 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 Kōzushima Kō Lighthouse?+
Kōzushima 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 Kōzushima Kō Lighthouse?+
You can track vessels near Kōzushima 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.