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Ieura Kō Lighthouse

Fl (2) Green 6s🇯🇵Tonosho, JPOperational

Location & Light Range

About Ieura Kō Lighthouse

Also known as: Ieura Kō (Teshima)

This 8.5-meter white concrete post, supporting the light, is attached to a 1-story square equipment shelter. The structure stands 12 meters above sea level and emits a green light with a single flash every 6 seconds. It marks the west end of the detached outer breakwater for Ieura harbor, located on the north coast of Teshima island. This navigational aid offers a geographic range of 11 nautical miles. The lighthouse is situated 0.1 kilometers from the nearest port, Ieura.

Why it matters: The lighthouse is indispensable for vessels entering and exiting Ieura harbor, providing a critical warning and guiding ships safely into port.

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
12m
Geographic Range
11NM

Location

City
Tonosho
Country
🇯🇵Japan
Region
Kagawa Prefecture
Sea Region
Ieura harbor, on the north coast of the island of Teshima, marking the west end of the detached outer breakwater.
Latitude
34.4917°
Longitude
134.0593°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: An 8.5m white concrete post, which supports the light, is attached to a square 1-story concrete equipment shelter.

References & Identifiers

Nearest Port
Ieura(0.1 km)
Admiralty No.
M5748.3
NGA No.
8060
ARLHS No.
JPN-2444
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Frequently Asked Questions

How do mariners identify Ieura Kō Lighthouse at night?+
Ieura Kō 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 Ieura Kō Lighthouse guide vessels into?+
Ieura Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Ieura at 0.2 NM to the E. Other ports served include Naoshima (4.1 NM WSW), Yamada (4.1 NM NW), Uno (5.2 NM W), Futamado (5.4 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ieura Kō Lighthouse still active and maintained?+
Yes, Ieura 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 Ieura Kō Lighthouse?+
Ieura 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 Ieura Kō Lighthouse?+
You can track vessels near Ieura 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.