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Chōshi Kō East Breakwater Lighthouse

Fl G 3s🇯🇵Eastern Honshū (Ibaraki and Chiba), JPOperational

Location & Light Range

About Chōshi Kō East Breakwater Lighthouse

This concrete lighthouse stands 15 meters tall with a focal height of 15 meters. The round tower, painted green, features a green light that flashes. It is situated on Eastern Honshū, an area encompassing parts of Ibaraki and Chiba prefectures. The structure is identified by NGA list number 4764 and Admiralty number M6482.4. With a geographic range of 11 nautical miles, it serves as a navigational aid.

Light & Optic

Characteristic Signature
Fl G 3s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
3s
Raw Code
Fl
Focal Height
15m
Geographic Range
11NM

Location

City
Eastern Honshū (Ibaraki and Chiba)
Country
🇯🇵JP
Latitude
35.7497°
Longitude
140.8604°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: White round concrete tower; 39

References & Identifiers

Admiralty No.
M6482.4
NGA No.
4764
ARLHS No.
JPN-1343
OpenStreetMap
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Frequently Asked Questions

How do mariners identify Chōshi Kō East Breakwater Lighthouse at night?+
Chōshi Kō East Breakwater displays the characteristic Fl G 3s — 1 green flash every 3 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 East Breakwater Lighthouse guide vessels into?+
Chōshi Kō East Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Choshi at 0.8 NM to the WSW. Other ports served include Naarai (1.1 NM SSW), Takada (1.1 NM SSW), Kashima, Ibaraki (12.9 NM NW), Futtsu, Chiba (25.3 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Chōshi Kō East Breakwater Lighthouse still active and maintained?+
Yes, Chōshi 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.
What shipping routes pass near Chōshi Kō East Breakwater Lighthouse?+
Chōshi Kō East 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 East Breakwater Lighthouse?+
You can track vessels near Chōshi 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.