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Marugame Kō Lighthouse

Fl (2) Red 6s🇯🇵Marugame, JPOperational

Location & Light Range

About Marugame Kō Lighthouse

Marugame Kō is a red concrete post structure, standing 8 meters tall, marking the western side of Marugame harbor's entrance in Kagawa Prefecture, Japan. It is situated at the end of a short pier, rising from a square, single-story concrete equipment shelter. The lighthouse was built and first lit in 1972, providing a geographic range of 11 nautical miles. Its light emits a red flash every 6 seconds. The site is open to the public, though the tower itself is closed.

Why it matters: This lighthouse is essential for the safe navigation of commercial and fishing vessels entering Marugame harbor.

Light & Optic

Characteristic Signature
Fl (2) Red 6s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
6s
Raw Code
Fl R 6s
Focal Height
12m
Geographic Range
11NM

Construction & History

Year Built
1972

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8m
Tower Shape
post
Tower Color
red
Material
concrete

Structure: An 8m red concrete post rising from a square 1-story concrete equipment shelter.

Location

City
Marugame
Country
🇯🇵Japan
Region
Kagawa Prefecture
Sea Region
Marugame harbor, Japan, marking the west side of the entrance.
Latitude
34.3107°
Longitude
133.7828°

References & Identifiers

Nearest Port
Marugame(0.7 km)
Admiralty No.
M5520.8
NGA No.
8340
ARLHS No.
JPN-2452
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Frequently Asked Questions

How do mariners identify Marugame Kō Lighthouse at night?+
Marugame Kō displays the characteristic Fl (2) Red 6s — 2 red flashes 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. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Marugame Kō Lighthouse guide vessels into?+
Marugame Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Aoki at 0.6 NM to the S. Other ports served include Ikunohama (0.6 NM S), Uga (0.6 NM S), Marugame (0.9 NM SSE), Tadotsu (2.8 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Marugame Kō Lighthouse still active and maintained?+
Yes, Marugame 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 Marugame Kō Lighthouse?+
Marugame 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 Marugame Kō Lighthouse?+
You can track vessels near Marugame 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.