Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Oi Kō No. 3 Breakwater Lighthouse

Fl Green 3s🇯🇵Minamichita, JPOperational

Location & Light Range

About Oi Kō No. 3 Breakwater Lighthouse

This 8.5-meter metal tower, painted white, stands at the end of a breakwater in Oi harbor, approximately 1.5 kilometers from Morozaki. The cylindrical structure houses a light with a focal height of 13 meters, emitting a green flash every 3 seconds. Its geographic range is 11.3 nautical miles. The site is open to the public, though the tower itself is closed. A previous listing incorrectly identified it as the No. 2 Breakwater light.

Why it matters: The lighthouse marks the safe passage into Oi harbor, a significant port for local shipping and fishing fleets. Its location on the breakwater guides vessels and helps prevent collisions.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
13m
Geographic Range
11.3NM

Construction & History

Significant events: NGA incorrectly listed as No. 2 Breakwater

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8.5m
Tower Shape
cylindrical
Tower Color
white
Material
metal

Structure: round cylindrical metal tower, painted white

Location

City
Minamichita
Country
🇯🇵Japan
Region
Aichi Prefecture
Sea Region
Oi harbor, at the end of a breakwater, about 3 km north of Morozaki
Latitude
34.7223°
Longitude
136.9651°

References & Identifiers

Nearest Port
Morozaki(1.5 km)
Admiralty No.
M6161.4
NGA No.
6084
ARLHS No.
JPN-1755
Live tracking · 50,000+ mariners

Find Oi Kō No. 3 Breakwater Lighthouse on the live nautical map

Plan voyages near Japan, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Oi Kō No. 3 Breakwater Lighthouse at night?+
Oi Kō No. 3 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 Oi Kō No. 3 Breakwater Lighthouse guide vessels into?+
Oi Kō No. 3 Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Morozaki at 1.3 NM to the SSE. Other ports served include Toyohama, Aichi (1.8 NM SW), Kowa (3.2 NM NW), Utsumi, Aichi (4.9 NM W), Fugusaki (6.6 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Oi Kō No. 3 Breakwater Lighthouse still active and maintained?+
Yes, Oi Kō No. 3 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 Oi Kō No. 3 Breakwater Lighthouse?+
Oi Kō No. 3 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 Oi Kō No. 3 Breakwater Lighthouse?+
You can track vessels near Oi Kō No. 3 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.