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Rumoi Inner Breakwater Lighthouse

Fl Green 3s🇯🇵Rumoi, JPOperational

Location & Light Range

About Rumoi Inner Breakwater Lighthouse

This lighthouse, constructed in 1974, stands as a cylindrical concrete tower painted white. It rises 11 meters, with its light positioned 12 meters above the water. The structure features a lantern and gallery and is located at the end of the inner north breakwater in Rumoi, Hokkaido Prefecture. Its light emits a green flash every 3 seconds, visible for 11 nautical miles. The station itself was originally established in 1932, predating the current tower.

Why it matters: This light is essential for maritime safety within the port of Rumoi, specifically marking the end of the inner breakwater and aiding vessels navigating the harbor's confined waters.

Light & Optic

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

Construction & History

Year Built
1974

Significant events: station established 1932

References & Identifiers

Nearest Port
Rumoi(0.6 km)
Admiralty No.
M6962
NGA No.
1284
ARLHS No.
JPN-954

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round hourglass-shaped concrete tower with lantern and gallery, painted white

Location

City
Rumoi
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
Located at the end of an inner breakwater of Rumoi, also known as the north breakwater.
Latitude
43.9589°
Longitude
141.6362°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Rumoi Inner Breakwater Lighthouse at night?+
Rumoi Inner 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 Rumoi Inner Breakwater Lighthouse guide vessels into?+
Rumoi Inner Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Rumoi at 0.2 NM to the S. Other ports served include Mashike (7.9 NM SW), Tomamae (21.5 NM N), Haboro (24.9 NM N), Yagishiri (30.3 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Rumoi Inner Breakwater Lighthouse still active and maintained?+
Yes, Rumoi Inner 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 Rumoi Inner Breakwater Lighthouse?+
You can track vessels near Rumoi Inner 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.