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Yōrō Kō West Breakwater Lighthouse

Fl 6s🇯🇵Tosashimizu, JPOperational

Location & Light Range

About Yōrō Kō West Breakwater Lighthouse

Also known as: Ashizuri

A cylindrical concrete tower, 11 meters high, stands on the west breakwater of Yōrō (Ashizuri) Kō, Japan. The tower features a flared top and is attached to a small equipment shelter. Its light has a focal height of 16 meters and emits two white flashes every 18 seconds. This navigational aid has a geographic range of 12.2 nautical miles. It is located 0.2 kilometers from the nearest port, Ashizuri, within Kochi Prefecture.

Why it matters: This lighthouse marks the end of the west breakwater, ensuring safe entry into Yōrō (Ashizuri) Kō for local fishing fleets and other vessels.

Light & Optic

Characteristic Signature
Fl 6s
Flash Type
Flashing
Interval
6s
Raw Code
Fl.(2)W
Focal Height
16m
Geographic Range
12.2NM

Location

City
Tosashimizu
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Located on the west breakwater of Yōrō (Ashizuri) Kō in Japan.
Latitude
32.7786°
Longitude
132.9348°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: round concrete tower with a flared top, attached to a small equipment shelter

References & Identifiers

Nearest Port
Ashizuri(0.2 km)
Admiralty No.
M5607.3
NGA No.
10292
ARLHS No.
JPN-2486
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Frequently Asked Questions

How do mariners identify Yōrō Kō West Breakwater Lighthouse at night?+
Yōrō Kō West Breakwater displays the characteristic Fl 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.
Which ports and harbors does Yōrō Kō West Breakwater Lighthouse guide vessels into?+
Yōrō Kō West Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Ashizuri at 0.3 NM to the NE. Other ports served include Tosashimizu (1.4 NM E), Kozukushi (12.5 NM WNW), Ozuku (12.7 NM WNW), Sukumowan (13.8 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yōrō Kō West Breakwater Lighthouse still active and maintained?+
Yes, Yōrō Kō West 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 Yōrō Kō West Breakwater Lighthouse?+
Yōrō Kō West 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 Yōrō Kō West Breakwater Lighthouse?+
You can track vessels near Yōrō Kō West 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.