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Kuki Ko Lighthouse

Iso W 6s🇯🇵Honshu-South Coast, JPOperational

This white, cylindrical tower stands 26 meters high. Its light emits an isophase white signal on a 6-second cycle. The light source is positioned at a focal height of 35 meters. This lighthouse has a geographic range of 4 nautical miles.

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
35m
Light Range
4NM (7.4 km)
Geographic Range
4NM
City
Honshu-South Coast
Country
🇯🇵JP
Latitude
34.0106°
Longitude
136.2581°
Flag
Type
Name
Dist.
Tower Height
26m
Tower Shape
cylindrical
Tower Color
white

Structure: White tower; 26

Admiralty No.
M6010.4
NGA No.
6624
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How far offshore can Kuki Ko Lighthouse be seen?+
With a focal height of 35 meters and a nominal range of 4 nautical miles (approximately 7.4 km), Kuki Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Kuki Ko Lighthouse at night?+
Kuki Ko displays the characteristic Iso W 6s — 1 white flash 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.
Which ports and harbors does Kuki Ko Lighthouse guide vessels into?+
Kuki Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Owase at 4.3 NM to the NNW. Other ports served include Nigishima (5.2 NM SSW), Hikimoto (6.1 NM N), Kinomoto (10.4 NM SW), Nagashima (12.3 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kuki Ko Lighthouse still active and maintained?+
Yes, Kuki Ko 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 Kuki Ko Lighthouse?+
Kuki Ko 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 Kuki Ko Lighthouse?+
You can track vessels near Kuki Ko 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.