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Ida Kō Lighthouse

Fl Green 4s🇯🇵Kuroshio, JPOperational

Location & Light Range

About Ida Kō Lighthouse

This cylindrical concrete lighthouse stands 9.5 meters tall with its light positioned 11 meters above sea level. It is situated on the north breakwater of Ida harbor, within the lee of Ino Misaki. The structure displays a green flashing light every four seconds. An additional spotlight, JCG-3086, is integrated into the structure to specifically illuminate a nearby reef. This light, with a geographic range of 10.7 nautical miles, guides vessels toward the nearest port of Kamikawaguchi, which is 0.5 kilometers away.

Why it matters: The Ida Kō lighthouse is essential for safe entry into Ida harbor, marking the channel and directly illuminating a hazardous reef near the entrance with an integrated spotlight.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Kuroshio
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Located on the north breakwater of Ida harbor, in the lee of Ino Misaki, Japan.
Latitude
33.0348°
Longitude
133.0734°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: round cylindrical concrete tower

References & Identifiers

Nearest Port
Kamikawaguchi(0.5 km)
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Frequently Asked Questions

How do mariners identify Ida Kō Lighthouse at night?+
Ida Kō displays the characteristic Fl Green 4s. 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 Ida Kō Lighthouse guide vessels into?+
Ida Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Saga at 3.1 NM to the NE. Other ports served include Ashizuri (16.6 NM SSW), Tosashimizu (16.6 NM SSW), Kaminokae (17 NM NNE), Sukumowan (19.3 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ida Kō Lighthouse still active and maintained?+
Yes, Ida Kō 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 Ida Kō Lighthouse?+
Ida Kō 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 Ida Kō Lighthouse?+
You can track vessels near Ida Kō 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.