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Sumiyoshi Kō East Breakwater Lighthouse

Fl (2) Green 6s🇯🇵Oita, JPOperational

Location & Light Range

About Sumiyoshi Kō East Breakwater Lighthouse

A 9.5-meter white concrete post, topped by a green flashing light, marks the end of the east breakwater in Sumiyoshi harbor, Oita. This structure, situated on a 1-story concrete equipment room, guides vessels navigating the harbor entrance. Its focal height reaches 14 meters, providing a geographic range of 11.6 nautical miles. The light emits a single green flash every 6 seconds. The lighthouse is attached to the breakwater, which extends approximately 3 kilometers from the Oita port.

Why it matters: This lighthouse is indispensable for local mariners, specifically guiding vessels safely past the east breakwater into Sumiyoshi harbor. Its green flashes prevent collisions with the harbor infrastructure, ensuring smooth navigation for fishing fleets and other local traffic.

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
14m
Geographic Range
11.6NM

Location

City
Oita
Country
🇯🇵Japan
Region
Oita Prefecture
Sea Region
Sumiyoshi harbor in Ōita, marking the end of the east breakwater.
Latitude
33.2565°
Longitude
131.6004°

References & Identifiers

Nearest Port
Oita(3.0 km)
Admiralty No.
M4948.4
NGA No.
9380
ARLHS No.
JPN-2333

Tower & Structure

Tower Height
9.5m
Tower Shape
round
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 Sumiyoshi Kō East Breakwater Lighthouse at night?+
Sumiyoshi 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 Sumiyoshi Kō East Breakwater Lighthouse guide vessels into?+
Sumiyoshi Kō East Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Oita at 3.3 NM to the E. Other ports served include Beppushinko (5.5 NM NW), Beppu, Oita (5.5 NM NW), Hiji (5.5 NM NW), Kitsuki (9.7 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sumiyoshi Kō East Breakwater Lighthouse still active and maintained?+
Yes, Sumiyoshi 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 Sumiyoshi Kō East Breakwater Lighthouse?+
Sumiyoshi 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 Sumiyoshi Kō East Breakwater Lighthouse?+
You can track vessels near Sumiyoshi 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.