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Keiyo Seaberth Lighthouse

Fl (3) White 12s🇯🇵Sodegaura, JPOperational

Location & Light Range

About Keiyo Seaberth Lighthouse

This white, cylindrical skeletal tower stands 30 meters tall and has a focal height of 35 meters. Located about 5 kilometers offshore from the Chiba waterfront, it is situated on a seaberth in the Sodegaura region. The light emits three white flashes every 12 seconds, visible for 16.2 nautical miles. The tower's nearest port is Anegasaki, located 3.8 kilometers away. Its operational status is active, and it is privately maintained.

Why it matters: This lighthouse is important for the safe navigation of vessels approaching the Keiyo Seaberth, a specialized offshore facility. Its continuous operation aids in the precise mooring of large cargo ships and tankers in a busy maritime zone.

Light & Optic

Characteristic Signature
Fl (3) White 12s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
12s
Raw Code
Fl(3) W 12s
Focal Height
35m
Geographic Range
16.2NM

Location

City
Sodegaura
Country
🇯🇵Japan
Region
Chiba Prefecture
Sea Region
A seaberth about 5 km off the Chiba waterfront.
Latitude
35.5113°
Longitude
139.9368°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
cylindrical
Tower Color
white

Structure: square cylindrical white skeletal tower

References & Identifiers

Nearest Port
Anegasaki(3.8 km)
Admiralty No.
M6435
NGA No.
5332
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Frequently Asked Questions

How do mariners identify Keiyo Seaberth Lighthouse at night?+
Keiyo Seaberth displays the characteristic Fl (3) White 12s — 3 white flashes every 12 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Keiyo Seaberth Lighthouse guide vessels into?+
Keiyo Seaberth Lighthouse assists vessels approaching 5 nearby ports. The closest is Anegasaki at 4.3 NM to the ESE. Other ports served include Urayasu (6.7 NM N), Ichihara (8.1 NM ENE), Tokyo (8.1 NM NW), Higashi-Ogishima (8.3 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Keiyo Seaberth Lighthouse still active and maintained?+
Yes, Keiyo Seaberth 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 Keiyo Seaberth Lighthouse?+
Keiyo Seaberth 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 Keiyo Seaberth Lighthouse?+
You can track vessels near Keiyo Seaberth 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.