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Sanbonmatsu Kō Detached Breakwater Lighthouse

Fl Green 3s🇯🇵Higashi-Kagawa, JPOperational

Location & Light Range

About Sanbonmatsu Kō Detached Breakwater Lighthouse

An 8.5-meter white concrete post light is situated at the northwest end of a short detached breakwater in Sanbonmatsu harbor. The light rises from a square, single-story concrete equipment shelter. It emits a green flash every 3 seconds from a focal height of 11 meters. This navigational aid is located in Higashi-Kagawa, Kagawa Prefecture, marking the entrance to the primary maritime gateway for the city. The site is open for public viewing, though the tower itself is closed.

Why it matters: This light is important for guiding vessels into Sanbonmatsu harbor, the principal port serving Higashikagama, by marking the northwest end of a detached breakwater.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Higashi-Kagawa
Country
🇯🇵Japan
Region
Kagawa Prefecture
Sea Region
Sanbonmatsu harbor, Higashikagama, marking the northwest end of a short detached breakwater.
Latitude
34.2578°
Longitude
134.3431°

References & Identifiers

Nearest Port
Sanbonmatsu(0.1 km)
Admiralty No.
M5550.3
NGA No.
8028
ARLHS No.
JPN-2463

Tower & Structure

Tower Height
8.5m
Tower Shape
post
Tower Color
white
Material
concrete

Structure: An 8.5m white concrete post light rises from a square 1-story concrete equipment shelter.

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 Sanbonmatsu Kō Detached Breakwater Lighthouse at night?+
Sanbonmatsu Kō Detached Breakwater displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Sanbonmatsu Kō Detached Breakwater Lighthouse guide vessels into?+
Sanbonmatsu Kō Detached Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Sanbonmatsu at 0.2 NM to the WSW. Other ports served include Shirotori (1.3 NM ESE), MATSUBARA (2.9 NM ESE), Hiketa (3.8 NM ESE), Tsuda (5.1 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sanbonmatsu Kō Detached Breakwater Lighthouse still active and maintained?+
Yes, Sanbonmatsu Kō Detached 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 Sanbonmatsu Kō Detached Breakwater Lighthouse?+
Sanbonmatsu Kō Detached 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 Sanbonmatsu Kō Detached Breakwater Lighthouse?+
You can track vessels near Sanbonmatsu Kō Detached 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.