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Yotsukura Kō Lighthouse

Fl (2) Red 6s🇯🇵Iwaki, JPOperational

Location & Light Range

About Yotsukura Kō Lighthouse

Also known as: Yotsukura Kō (Detached Breakwater)

A red, cylindrical concrete tower, 9 meters high, marks the south end of a detached breakwater off the Yotsukura fishing port. The structure features a flared top and stands 13 meters above sea level. Its light emits a single red flash every 6 seconds, visible for 11.3 nautical miles. The site is accessible by boat, though the tower itself remains closed to visitors. The lighthouse is located in Iwaki, Fukushima Prefecture, Japan.

Why it matters: This lighthouse provides critical guidance for the local fishing fleet of Yotsukura, ensuring safe passage into and out of the port.

Light & Optic

Characteristic Signature
Fl (2) Red 6s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
6s
Raw Code
Fl R 6s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Iwaki
Country
🇯🇵Japan
Region
Fukushima Prefecture
Sea Region
Located at the south end of a short detached breakwater off the fishing port of Yotsukura.
Latitude
37.1079°
Longitude
141.0013°

References & Identifiers

Nearest Port
Yotsukura(0.2 km)
Admiralty No.
M6514.3
NGA No.
4542
ARLHS No.
JPN-1373

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round concrete tower with a flared top

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Yotsukura Kō Lighthouse at night?+
Yotsukura Kō displays the characteristic Fl (2) Red 6s — 2 red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Yotsukura Kō Lighthouse guide vessels into?+
Yotsukura Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Yotsukura at 0.2 NM to the WSW. Other ports served include Hisanohama (2.4 NM N), Ena (8.6 NM SSW), Nakanosaku (9.3 NM SSW), Ishiwaki (11.6 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yotsukura Kō Lighthouse still active and maintained?+
Yes, Yotsukura Kō 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 Yotsukura Kō Lighthouse?+
Yotsukura Kō 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 Yotsukura Kō Lighthouse?+
You can track vessels near Yotsukura Kō 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.