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Omodaka Lighthouse

Fl White 4s🇯🇵Saikai, JPOperational

Location & Light Range

About Omodaka Lighthouse

Also known as: Omodaka (Shira Se)

Established in 1903, the Omodaka lighthouse is a 7-meter-tall cylindrical concrete tower situated on a small island about 4 kilometers west of Kōgo Saki. Its light, positioned 18 meters above sea level, emits a white flash every 4 seconds and has a geographic range of 12.7 nautical miles. The lighthouse complex includes a round concrete tower with a gallery. While the island site is open to visitors, the tower itself is closed to the public. The nearest port, also named Omodaka, is 2.4 kilometers away.

Why it matters: The lighthouse is essential for local navigation, specifically alerting mariners to the dangerous rocks situated to its east, which are highlighted by a distinct red sector light.

Light & Optic

Characteristic Signature
Fl White 4s
Flash Type
Flashing
Light Color
White
Interval
4s
Raw Code
Fl W 4s
Focal Height
18m
Geographic Range
12.7NM

Construction & History

First Lit
1903

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower with gallery

Location

City
Saikai
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
Situated on a small island approximately 4 km west of Kōgo Saki, it guides mariners and highlights dangerous rocks to the east with a distinct red sector light.
Latitude
33.0926°
Longitude
129.6275°

References & Identifiers

Nearest Port
Omodaka(2.4 km)
ARLHS No.
JPN-2264
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Frequently Asked Questions

How do mariners identify Omodaka Lighthouse at night?+
Omodaka displays the characteristic Fl White 4s. 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 Omodaka Lighthouse guide vessels into?+
Omodaka Lighthouse assists vessels approaching 5 nearby ports. The closest is Omodaka at 2.4 NM to the ESE. Other ports served include Ôshima, Nagasaki (3.3 NM S), Sasebo (5.8 NM NE), Ainoura/Sasebo (6.2 NM NNE), Haiki (6.3 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Omodaka Lighthouse still active and maintained?+
Yes, Omodaka 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 Omodaka Lighthouse?+
Omodaka 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 Omodaka Lighthouse?+
You can track vessels near Omodaka 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.