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Usa Kō Training Wall Lighthouse

Fl Green 3s🇯🇵Tosa, JPOperational

Location & Light Range

About Usa Kō Training Wall Lighthouse

Also known as: Usa Kō Training Wall (Detached Breakwater)

This 9.5-meter white concrete post light is situated at the eastern end of the detached breakwater for Usa harbor in Tosa, Kochi Prefecture, Japan. The structure includes a square, one-story concrete equipment room to which the post is attached. Its green light flashes every three seconds, visible for 10.7 nautical miles. Access to the site is possible by boat, though the tower itself is closed to the public. The light guides vessels into the harbor, which is approximately 7.7 kilometers from Kochi.

Why it matters: This light marks the eastern end of the detached breakwater at Usa harbor, ensuring safe passage for local fishing fleets and other maritime traffic entering this Japanese port.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Tosa
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Usa harbor, at the east end of its detached breakwater.
Latitude
33.4480°
Longitude
133.4501°

References & Identifiers

Nearest Port
Kochi(7.7 km)
ARLHS No.
JPN-2522

Tower & Structure

Tower Height
9.5m
Tower Shape
post
Tower Color
white
Material
concrete

Structure: A 9.5m white concrete post attached to a square 1-story concrete equipment room.

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 Usa Kō Training Wall Lighthouse at night?+
Usa Kō Training Wall 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 Usa Kō Training Wall Lighthouse guide vessels into?+
Usa Kō Training Wall Lighthouse assists vessels approaching 5 nearby ports. The closest is Usa/Tosa at 0.3 NM to the WSW. Other ports served include Kochi (8 NM NE), Susaki (8.5 NM WSW), Kaminokae (14.4 NM SW), Saga (28.1 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Usa Kō Training Wall Lighthouse still active and maintained?+
Yes, Usa Kō Training Wall 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 Usa Kō Training Wall Lighthouse?+
Usa Kō Training Wall 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 Usa Kō Training Wall Lighthouse?+
You can track vessels near Usa Kō Training Wall 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.