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

Indoji Kō Lighthouse

F Green 5s🇯🇵Iki, JPOperational

Location & Light Range

About Indoji Kō Lighthouse

Also known as: Indoji Kō (West Breakwater)

Indoji Kō is an 8.5-meter white concrete post with an attached square concrete equipment room, standing 11 meters above sea level. The lighthouse emits a green light, characterized by a single flash every five seconds. Its geographic range is 10.7 nautical miles. This operational light is situated at the east end of the detached outer breakwater of Indoji harbor, on the southeastern coast of Iki Shima. The nearest port, Yobuko, is 13.6 kilometers away.

Why it matters: Indoji Kō is essential for marking the eastern end of the detached outer breakwater, guiding vessels into Indoji harbor and ensuring safe passage.

Light & Optic

Characteristic Signature
F Green 5s
Flash Type
Fixed
Light Color
Green
Interval
5s
Raw Code
F.Fl G 5s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Iki
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
East end of the detached outer breakwater of Indoji harbor, on the southeastern coast of Iki Shima.
Latitude
33.7390°
Longitude
129.7530°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: An 8.5m white concrete post attached to a square concrete equipment room.

References & Identifiers

Nearest Port
Yobuko(13.6 km)
Admiralty No.
M5261.71
ARLHS No.
JPN-2191
Live tracking · 50,000+ mariners

Find Indoji Kō 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 Indoji Kō Lighthouse at night?+
Indoji Kō displays the characteristic F Green 5s. 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 Indoji Kō Lighthouse guide vessels into?+
Indoji Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Ashibe at 4.1 NM to the N. Other ports served include Katsumoto (7.8 NM NNW), Yobuko (13.7 NM SSE), Tobo (17.8 NM SSE), Karatsu (18.7 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Indoji Kō Lighthouse still active and maintained?+
Yes, Indoji 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 Indoji Kō Lighthouse?+
Indoji 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 Indoji Kō Lighthouse?+
You can track vessels near Indoji 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.