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Osumihirase Lighthouse

Fl W 3s🇯🇵Nansei Shoto, JPOperational

Location & Light Range

About Osumihirase Lighthouse

This metal lighthouse stands 28 meters tall, featuring a round, red tower. The structure is supported by piles and displays a red triangle with the point facing upward as a daymark. Its light emits a single white flash every 3 seconds, visible for a geographic range of 7 nautical miles. The lighthouse is operational and located in Nansei Shoto.

Light & Optic

Characteristic Signature
Fl W 3s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
3s
Raw Code
Fl.W. period 3s
Focal Height
28m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
30.0420°
Longitude
130.0531°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
round
Tower Color
red
Material
metal

Structure: Piles, red triangle, point up daymark

References & Identifiers

Admiralty No.
M4785
NGA No.
13088
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Frequently Asked Questions

How far offshore can Osumihirase Lighthouse be seen?+
With a focal height of 28 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Osumihirase 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 Osumihirase Lighthouse at night?+
Osumihirase displays the characteristic Fl W 3s — 1 white flash every 3 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 Osumihirase Lighthouse guide vessels into?+
Osumihirase Lighthouse assists vessels approaching 5 nearby ports. The closest is Nanatsuyama at 14.4 NM to the SW. Other ports served include Kurio (23.3 NM NE), Yudomari (24.7 NM ENE), Mugi (26.8 NM NNE), Yumugi (26.8 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Osumihirase Lighthouse still active and maintained?+
Yes, Osumihirase 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 Osumihirase Lighthouse?+
Osumihirase 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 Osumihirase Lighthouse?+
You can track vessels near Osumihirase 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.