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Iruka Saki Lighthouse

Oc (2) White 6s🇯🇵Iki, JPOperational

Location & Light Range

About Iruka Saki Lighthouse

This white, cylindrical concrete tower stands 10 meters tall and was built in 1967. It is attached to a single-story concrete equipment room. The lighthouse emits a white occulting light, characterized by two flashes every 6 seconds, visible for 15.5 nautical miles. Its focal plane is situated 31 meters above sea level. Located on the southern tip of Iki Shima, the lighthouse guides vessels navigating near this Japanese island. The nearest port, Yobuko, is 13 kilometers away.

Why it matters: The Iruka Saki Lighthouse is essential for guiding ships around the southern extremity of Iki Shima, helping to prevent groundings in the East China Sea.

Light & Optic

Characteristic Signature
Oc (2) White 6s
Flash Type
Occulting
Light Color
White
Flash Count
2 flashes
Interval
6s
Raw Code
Oc(2) W 6s
Focal Height
31m
Geographic Range
15.5NM

Construction & History

Year Built
1967

References & Identifiers

Nearest Port
Yobuko(13.0 km)
Admiralty No.
M5261.74
NGA No.
12700
ARLHS No.
JPN-177

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
White
Material
concrete

Structure: round concrete tower attached to a small 1-story concrete equipment room

Location

City
Iki
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
southern tip of Iki Shima
Latitude
33.7046°
Longitude
129.7165°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Iruka Saki Lighthouse at night?+
Iruka Saki displays the characteristic Oc (2) White 6s — 2 white 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Iruka Saki Lighthouse guide vessels into?+
Iruka Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Ashibe at 6.5 NM to the NNE. Other ports served include Katsumoto (9.3 NM N), Yobuko (13.1 NM SE), Tobo (17.1 NM SE), Karatsu (18.2 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Iruka Saki Lighthouse still active and maintained?+
Yes, Iruka Saki 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 Iruka Saki Lighthouse?+
Iruka Saki 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 Iruka Saki Lighthouse?+
You can track vessels near Iruka Saki 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.