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Tomakomai Kō East Breakwater Lighthouse

Iso R 4s🇯🇵Southern Hokkaidō, JPOperational

Location & Light Range

About Tomakomai Kō East Breakwater Lighthouse

This red, cylindrical concrete tower stands 52 meters tall. Its focal plane is 17 meters above sea level, and it emits a red light. The light flashes once every 4 seconds, with 2 seconds of light followed by 2 seconds of darkness. This structure serves as the eastern breakwater light for the entrance to Tomakomai harbor in Southern Hokkaido. It was built and first lit in 2025.

Light & Optic

Characteristic Signature
Iso R 4s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Fl.R
Focal Height
17m
Geographic Range
7NM

Construction & History

Year Built
2025

References & Identifiers

Admiralty No.
M6773.7
NGA No.
0672
ARLHS No.
JPN-666

Tower & Structure

Tower Height
52m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: Red round concrete structure; 52

Location

City
Southern Hokkaidō
Country
🇯🇵JP
Latitude
42.6148°
Longitude
141.6206°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Tomakomai Kō East Breakwater Lighthouse at night?+
Tomakomai Kō East Breakwater displays the characteristic Iso 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 Tomakomai Kō East Breakwater Lighthouse guide vessels into?+
Tomakomai Kō East Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Tomakomai at 1.2 NM to the NNE. Other ports served include Shiraoi (14.5 NM WSW), Noboribetsu (22.4 NM WSW), Muroran (33.2 NM WSW), Niikappu (34.2 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tomakomai Kō East Breakwater Lighthouse still active and maintained?+
Yes, Tomakomai Kō East 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 Tomakomai Kō East Breakwater Lighthouse?+
You can track vessels near Tomakomai Kō East 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.