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Kozuchishima Lighthouse

Iso W 6s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Kozuchishima Lighthouse

This white masonry tower and lantern structure stands 30 meters high. It is located in Seto Naikai Eastern. The lighthouse emits an isophase white light on a 6-second cycle. Its focal plane is 15 meters above sea level.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
15m
Light Range
8NM (14.8 km)
Geographic Range
8NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.3964°
Longitude
133.9221°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
lantern
Tower Color
white
Material
masonry

Structure: White masonry tower, and lantern; 30

References & Identifiers

Admiralty No.
M5536
NGA No.
8208
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Frequently Asked Questions

How far offshore can Kozuchishima Lighthouse be seen?+
With a focal height of 15 meters and a nominal range of 8 nautical miles (approximately 14.8 km), Kozuchishima is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Kozuchishima Lighthouse at night?+
Kozuchishima displays the characteristic Iso W 6s — 1 white flash every 6 seconds. 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.
Which ports and harbors does Kozuchishima Lighthouse guide vessels into?+
Kozuchishima Lighthouse assists vessels approaching 5 nearby ports. The closest is Hibi at 3.5 NM to the N. Other ports served include Shibukawa (3.8 NM NNW), Tamano (4.6 NM N), Sakaide (4.7 NM SW), Naoshima (5 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kozuchishima Lighthouse still active and maintained?+
Yes, Kozuchishima 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 Kozuchishima Lighthouse?+
Kozuchishima 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 Kozuchishima Lighthouse?+
You can track vessels near Kozuchishima 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.