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Ōzai Kō East Breakwater Lighthouse

Fl (2) Green 6s🇯🇵Oita, JPOperational

Location & Light Range

About Ōzai Kō East Breakwater Lighthouse

This concrete lighthouse, 10 meters tall, stands at the west end of a detached breakwater on Ōita's eastern side. The cylindrical tower, painted white, is 13 meters above sea level at its focal plane. It features a flared top and is connected to an equipment shelter. The light displays a green flash every 6 seconds, visible for 11.3 nautical miles. Access to the site is by boat only, though the tower itself is not open to the public. It marks the breakwater for vessels approaching Ōita.

Why it matters: This light is essential for guiding vessels navigating the eastern approaches to Ōita and warning them about the detached breakwater.

Light & Optic

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

Location

City
Oita
Country
🇯🇵Japan
Region
Oita Prefecture
Sea Region
Located at the west end of a detached breakwater on the east side of Ōita.
Latitude
33.2604°
Longitude
131.7386°

References & Identifiers

Nearest Port
Oita(3.9 km)
Admiralty No.
M4947.18
NGA No.
9340
USCG No.
JCG-4982.8

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower, flared at the top and attached to a small equipment shelter

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 Ōzai Kō East Breakwater Lighthouse at night?+
Ōzai Kō East Breakwater displays the characteristic Fl (2) Green 6s — 2 green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Ōzai Kō East Breakwater Lighthouse guide vessels into?+
Ōzai Kō East Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Oita at 3.7 NM to the W. Other ports served include Saganoseki (6.7 NM E), Usuki (8.8 NM SSE), Morie (10.2 NM NNW), Kitsuki (11.2 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōzai Kō East Breakwater Lighthouse still active and maintained?+
Yes, Ōzai Kō East 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 East Breakwater Lighthouse?+
Ōzai Kō East 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 East Breakwater Lighthouse?+
You can track vessels near Ōzai Kō East 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.