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Muroran Kō South Breakwater Lighthouse

Fl R 4s🇯🇵Southern Hokkaidō, JPOperational

Location & Light Range

About Muroran Kō South Breakwater Lighthouse

This red, cylindrical concrete tower stands 36 meters tall and has a focal plane of 13 meters. It emits a single red flash every 4 seconds, with a geographic range of 3 nautical miles. The lighthouse is located at the end of an older breakwater in Southern Hokkaidō, Japan, east of the Hakuchō Bridge.

Light & Optic

Characteristic Signature
Fl R 4s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Fl.R
Focal Height
13m
Geographic Range
3NM

Location

City
Southern Hokkaidō
Country
🇯🇵JP
Latitude
42.3506°
Longitude
140.9505°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
36m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: Red tower; 36

References & Identifiers

Admiralty No.
M6750
NGA No.
0720
ARLHS No.
JPN-919
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Frequently Asked Questions

How do mariners identify Muroran Kō South Breakwater Lighthouse at night?+
Muroran Kō South Breakwater displays the characteristic Fl R 4s — 1 red flash every 4 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 Muroran Kō South Breakwater Lighthouse guide vessels into?+
Muroran Kō South Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Muroran at 0.9 NM to the ESE. Other ports served include Noboribetsu (11.3 NM ENE), Youra (17.2 NM NW), Shiraoi (19.2 NM ENE), Moriage (21.5 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Muroran Kō South Breakwater Lighthouse still active and maintained?+
Yes, Muroran Kō South 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.
How can I track vessels near Muroran Kō South Breakwater Lighthouse?+
You can track vessels near Muroran Kō South 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.