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Ushimado Kō Breakwater Lighthouse

Fl Green 3s🇯🇵Setouchi, JPOperational

Location & Light Range

About Ushimado Kō Breakwater Lighthouse

Also known as: #Ushimado Kō Breakwater

This green flashing light marks the end of a detached breakwater at Ushimado, Japan. Built in 1950, the original structure was an 8-meter white concrete post. It was replaced around 2020 with a modern system. The current light emits a green flash every 3 seconds from a focal height of 12 meters. The octagonal concrete tower stands 8 meters tall and has a geographic range of 11 nautical miles. The site is open to visitors who can reach it by boat, though the tower itself is closed.

Why it matters: This light serves as a critical marker for vessels navigating into Ushimado port, guiding them clear of the detached breakwater.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
12m
Geographic Range
11NM

Construction & History

Year Built
1950

Significant events: Replaced around 2020

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8m
Tower Shape
octagonal
Tower Color
white
Material
concrete

Structure: An 8m white post.

Location

City
Setouchi
Country
🇯🇵Japan
Region
Okayama Prefecture
Sea Region
Located at the end of a detached breakwater at Ushimado, a small and very scenic port about 25 km east southeast of Okayama.
Latitude
34.6145°
Longitude
134.1651°

References & Identifiers

Nearest Port
Ushimado(0.7 km)
Admiralty No.
M5752
NGA No.
7852
ARLHS No.
JPN-1904
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Frequently Asked Questions

How do mariners identify Ushimado Kō Breakwater Lighthouse at night?+
Ushimado Kō Breakwater displays the characteristic Fl Green 3s. 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 Ushimado Kō Breakwater Lighthouse guide vessels into?+
Ushimado Kō Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Ushimado at 0.5 NM to the WSW. Other ports served include Kugui (6.4 NM NNE), Bizen (7.2 NM N), Katakami (7.4 NM NNE), Tonosho (7.9 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ushimado Kō Breakwater Lighthouse still active and maintained?+
Yes, Ushimado Kō 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 Ushimado Kō Breakwater Lighthouse?+
Ushimado Kō 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 Ushimado Kō Breakwater Lighthouse?+
You can track vessels near Ushimado Kō 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.