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Koyamamisaki Lighthouse

Fl W 15s🇯🇵Honshu-Northwest Coast, JPInactive

Location & Light Range

About Koyamamisaki Lighthouse

This white cylindrical tower, accented with red bands, reaches a height of 25 meters. Its focal plane is situated 93 meters above sea level. The structure offers a geographic range of 21 nautical miles. A single white flash repeats every 15 seconds. This lighthouse is not currently in operation.

Light & Optic

Characteristic Signature
Fl W 15s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
15s
Raw Code
Fl.W. period 15s
Focal Height
93m
Light Range
17NM (31.5 km)
Geographic Range
21NM

Location

City
Honshu-Northwest Coast
Country
🇯🇵JP
Latitude
34.6626°
Longitude
131.6159°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
25m
Tower Shape
cylindrical
Tower Color
white and red

Structure: White cylindrical tower, red banded; 25

References & Identifiers

Admiralty No.
M7359
NGA No.
1784
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Frequently Asked Questions

How far offshore can Koyamamisaki Lighthouse be seen?+
With a focal height of 93 meters and a nominal range of 17 nautical miles (approximately 31.5 km), Koyamamisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Koyamamisaki Lighthouse at night?+
Koyamamisaki displays the characteristic Fl W 15s — 1 white flash every 15 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 Koyamamisaki Lighthouse guide vessels into?+
Koyamamisaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Esaki at 1.8 NM to the SE. Other ports served include Susa (2.7 NM SSW), Masuda, Shimane (10.4 NM E), Hagi (16.9 NM SW), Misumi, Shimane (17.1 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Koyamamisaki Lighthouse still active and maintained?+
Koyamamisaki Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
What shipping routes pass near Koyamamisaki Lighthouse?+
Koyamamisaki 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 Koyamamisaki Lighthouse?+
You can track vessels near Koyamamisaki 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.