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Chōshi Kō North Breakwater Lighthouse

Fl (2) G 6s🇯🇵Eastern Honshū (Ibaraki and Chiba), JPOperational

Location & Light Range

About Chōshi Kō North Breakwater Lighthouse

This concrete breakwater lighthouse stands 15 meters tall, with its focal plane at the same height. The round tower, painted white, is 15 meters high and features a gallery. It emits two green flashes every 6 seconds. The structure is attached to a small concrete equipment shelter and is located at the north end of the breakwater. The geographic range of its light is 6 nautical miles.

Light & Optic

Characteristic Signature
Fl (2) G 6s
Flash Type
Flashing
Light Color
Green
Flash Count
2 flashes
Interval
6s
Raw Code
Fl
Focal Height
15m
Geographic Range
6NM

Location

City
Eastern Honshū (Ibaraki and Chiba)
Country
🇯🇵JP
Latitude
35.7525°
Longitude
140.8611°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
15m
Tower Shape
round
Tower Color
green
Material
concrete

Structure: White tower; 33

References & Identifiers

Admiralty No.
M6482.2
NGA No.
4768
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Frequently Asked Questions

How do mariners identify Chōshi Kō North Breakwater Lighthouse at night?+
Chōshi Kō North Breakwater displays the characteristic Fl (2) G 6s — 2 green flashes every 6 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Chōshi Kō North Breakwater Lighthouse guide vessels into?+
Chōshi Kō North Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Choshi at 0.9 NM to the WSW. Other ports served include Naarai (1.3 NM SSW), Takada (1.3 NM SSW), Kashima, Ibaraki (12.8 NM NW), Futtsu, Chiba (25.4 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Chōshi Kō North Breakwater Lighthouse still active and maintained?+
Yes, Chōshi Kō North 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.
What shipping routes pass near Chōshi Kō North Breakwater Lighthouse?+
Chōshi Kō North Breakwater 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 Chōshi Kō North Breakwater Lighthouse?+
You can track vessels near Chōshi Kō North 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.