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City Lighthouse

Oc White 6s🇯🇵Choshi, JPOperational

Location & Light Range

About City Lighthouse

This white, cylindrical concrete tower stands 16 meters tall and is situated on a rock adjacent to the end of a detached breakwater. It marks the south side of the entrance to the Tone River and Chōshi harbor. The lighthouse emits an occulting white light, appearing for three seconds followed by a three-second eclipse. Its base is circular and made of concrete, with a lantern and gallery mounted on top. The nearest port is Choshi, only 0.1 kilometers away, and the geographic range of its light is 12.2 nautical miles.

Why it matters: The lighthouse is essential for guiding vessels entering the Tone River and Chōshi harbor, a busy navigational area.

Light & Optic

Characteristic Signature
Oc White 6s
Flash Type
Occulting
Light Color
White
Interval
6s
Raw Code
Oc W 6s
Focal Height
16m
Geographic Range
12.2NM

Location

City
Choshi
Country
🇯🇵Japan
Region
Chiba Prefecture
Sea Region
Located on a rock adjacent to the end of a detached breakwater on the south side of the entrance to the Tone River and Chōshi harbor.
Latitude
35.7478°
Longitude
140.8565°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
16m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower with lantern and gallery mounted on a robust circular concrete base

References & Identifiers

Nearest Port
Choshi(0.1 km)
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Frequently Asked Questions

How do mariners identify City Lighthouse at night?+
City displays the characteristic Oc White 6s. 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 City Lighthouse guide vessels into?+
City Lighthouse assists vessels approaching 5 nearby ports. The closest is Choshi at 0.6 NM to the WSW. Other ports served include Naarai (0.9 NM SSW), Takada (0.9 NM SSW), Kashima, Ibaraki (12.9 NM NW), Futtsu, Chiba (25.1 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is City Lighthouse still active and maintained?+
Yes, City 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 City Lighthouse?+
City 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 City Lighthouse?+
You can track vessels near City 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.