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Ōzai Kō West Breakwater Lighthouse

Fl (2) Red 6s🇯🇵Oita, JPOperational

Location & Light Range

About Ōzai Kō West Breakwater Lighthouse

Also known as: Ōzai Kō West Breakwater (?)

This red concrete post lighthouse, standing 9 meters tall, is situated at the eastern end of a detached breakwater on the east side of Ōita, Japan. The structure includes a 1-story concrete equipment room. It emitted a red light, flashing once every 6 seconds, with a geographic range of 11 nautical miles. The tower, reaching a focal height of 12 meters, was attached to a square equipment room. Recent observations from May 2023 suggest the light may have been removed, as it was not visible in photographs or satellite views. While the site is accessible by boat, the tower itself remains closed to the public.

Why it matters: The lighthouse served to warn vessels of the detached breakwater at Ōzai Kō, ensuring safe passage for boats using 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
12m
Geographic Range
11NM

Construction & History

Significant events: Apparently removed, not seen in May 2023 photo or satellite view

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: A 9m red concrete post attached to a square 1-story concrete equipment room.

Location

City
Oita
Country
🇯🇵Japan
Region
Oita Prefecture
Sea Region
Located at the east end of a detached breakwater on the east side of Ōita, Japan.
Latitude
33.2633°
Longitude
131.7347°

References & Identifiers

Nearest Port
Oita(3.8 km)
Admiralty No.
M4947.19
NGA No.
9341
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Frequently Asked Questions

How do mariners identify Ōzai Kō West Breakwater Lighthouse at night?+
Ōzai Kō West Breakwater 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 Ōzai Kō West Breakwater Lighthouse guide vessels into?+
Ōzai Kō West Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Oita at 3.5 NM to the WSW. Other ports served include Saganoseki (6.9 NM E), Usuki (9 NM SSE), Morie (9.9 NM NNW), Kitsuki (10.9 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōzai Kō West Breakwater Lighthouse still active and maintained?+
Yes, Ōzai 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 Ōzai Kō West Breakwater Lighthouse?+
Ōzai 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 Ōzai Kō West Breakwater Lighthouse?+
You can track vessels near Ōzai 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.