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Koshiki Lighthouse

Fl W 10s🇯🇵Gotō Islands, JPOperational

Location & Light Range

About Koshiki Lighthouse

This lighthouse is a cylindrical red tower constructed from fiberglass. The structure stands on red glass reinforced plastic piles and includes a topmark. It emits a white flash on a 4-second cycle. The focal height of the light is 70 meters above sea level. Its geographic range covers 7 nautical miles. The lighthouse is currently operational.

Light & Optic

Characteristic Signature
Fl W 10s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
10s
Raw Code
Fl.W. period 4s
Focal Height
70m
Geographic Range
7NM

Location

City
Gotō Islands
Country
🇯🇵JP
Latitude
33.3030°
Longitude
129.1707°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
cylindrical
Tower Color
red
Material
fiberglass

Structure: STARBOARD (IALA B) Red glass reinforced plastic(grp) fiberglass piles, topmark

References & Identifiers

Admiralty No.
M5018
NGA No.
12720
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Frequently Asked Questions

How do mariners identify Koshiki Lighthouse at night?+
Koshiki displays the characteristic Fl W 10s — 1 white flash every 10 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 Koshiki Lighthouse guide vessels into?+
Koshiki Lighthouse assists vessels approaching 5 nearby ports. The closest is Ikitsuki at 14 NM to the ENE. Other ports served include Tsuyoshi (15.2 NM ESE), Kawachi, Nagasaki (17.5 NM E), Hirado (19.7 NM ENE), Aokata (19.9 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Koshiki Lighthouse still active and maintained?+
Yes, Koshiki 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 Koshiki Lighthouse?+
Koshiki 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 Koshiki Lighthouse?+
You can track vessels near Koshiki 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.