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Masaki Kō Lighthouse

Fl Red 3s🇯🇵Masaki, JPOperational

Location & Light Range

About Masaki Kō Lighthouse

This 8-meter red concrete lighthouse, standing at a focal height of 12 meters, guides vessels into Masaki Harbor. The cylindrical tower is attached to a one-story concrete equipment room. Its geographic range extends to 11 nautical miles, and it emits a single red flash every 3 seconds. Located at the end of the breakwater in southern Matsuyama, the lighthouse structure is accessible to the public, although entry into the tower itself is not permitted. The nearest port, Iyo, is approximately 0.6 kilometers away.

Why it matters: Masaki Kō is essential for the safe navigation of vessels, particularly local fishing fleets and smaller commercial craft, entering and exiting Masaki Harbor. Its red flash precisely marks the end of the breakwater, preventing groundings and ensuring clear passage into the port.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
12m
Geographic Range
11NM

Location

City
Masaki
Country
🇯🇵Japan
Region
Ehime Prefecture
Sea Region
Located at the end of the breakwater of Masaki Harbor in southern Matsuyama, Japan.
Latitude
33.7864°
Longitude
132.6922°

References & Identifiers

Nearest Port
Iyo(0.6 km)
Admiralty No.
M5432
NGA No.
9260

Tower & Structure

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

Structure: An 8m red concrete post with a lantern, attached to a 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 Masaki Kō Lighthouse at night?+
Masaki Kō displays the characteristic Fl Red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Masaki Kō Lighthouse guide vessels into?+
Masaki Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Masaki at 3.8 NM to the N. Other ports served include Mitsuhama (3.8 NM N), Matsuyama (5.6 NM N), Hojo (12.4 NM NNE), Ihota (16 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Masaki Kō Lighthouse still active and maintained?+
Yes, Masaki 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 Masaki Kō Lighthouse?+
Masaki 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 Masaki Kō Lighthouse?+
You can track vessels near Masaki 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.