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Takamatsu Asahimachi Breakwater Lighthouse

Oc (2) Red 6s🇯🇵Takamatsu, JPOperational

Location & Light Range

About Takamatsu Asahimachi Breakwater Lighthouse

This red concrete post lighthouse stands 9.5 meters tall, situated atop a square, one-story equipment shelter. Its focal plane is 12 meters above the water. The light emits two red flashes every six seconds, visible for 11 nautical miles. It marks the end of Takamatsu's main east breakwater, extending into the harbor waters. The structure is made of concrete and is located 0.4 km from the nearest port.

Why it matters: The lighthouse is essential for guiding vessels safely into and out of Takamatsu harbor, marking the termination of the main east breakwater and ensuring the smooth flow of maritime traffic.

Light & Optic

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

Location

City
Takamatsu
Country
🇯🇵Japan
Region
Kagawa Prefecture
Sea Region
Takamatsu harbor, marking the end of its main east breakwater.
Latitude
34.3604°
Longitude
134.0586°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9.5m
Tower Shape
post
Tower Color
red
Material
concrete

Structure: A 9.5m red concrete post light rising from a square 1-story concrete equipment shelter.

References & Identifiers

Nearest Port
Takamatsu(0.4 km)
Admiralty No.
M5541
NGA No.
8172
ARLHS No.
JPN-2434
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Frequently Asked Questions

How do mariners identify Takamatsu Asahimachi Breakwater Lighthouse at night?+
Takamatsu Asahimachi Breakwater displays the characteristic Oc (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 Takamatsu Asahimachi Breakwater Lighthouse guide vessels into?+
Takamatsu Asahimachi Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Takamatsu at 0.9 NM to the WNW. Other ports served include Naoshima (7 NM NNW), Ieura (7.9 NM N), Hibi (8.5 NM NW), Tamano (8.9 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Takamatsu Asahimachi Breakwater Lighthouse still active and maintained?+
Yes, Takamatsu Asahimachi Breakwater 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 Takamatsu Asahimachi Breakwater Lighthouse?+
Takamatsu Asahimachi Breakwater 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 Takamatsu Asahimachi Breakwater Lighthouse?+
You can track vessels near Takamatsu Asahimachi Breakwater 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.