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Seigan Shima Lighthouse

Fl (2) White 5s🇯🇵Toba, JPOperational

Location & Light Range

About Seigan Shima Lighthouse

This concrete lighthouse stands 9.5 meters tall on a reef at the southern entrance to the Kabura Strait. Its cylindrical, hourglass shape is painted black with a single red horizontal band. The lighthouse emits a white light that flashes once every five seconds. Its geographic range extends to 10.2 nautical miles. The site is accessible by boat and open to the public, though the tower itself remains closed.

Why it matters: The Seigan Shima lighthouse is essential for guiding vessels through the Kabura Strait, warning them of the reef it marks.

Light & Optic

Characteristic Signature
Fl (2) White 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl W 5s
Focal Height
9.5m
Geographic Range
10.2NM

Location

City
Toba
Country
🇯🇵Japan
Region
Mie Prefecture
Sea Region
reef in the center of the southern entrance to the Kabura Strait
Latitude
34.4862°
Longitude
136.8639°

References & Identifiers

Nearest Port
Toba(0.8 km)
Admiralty No.
M6047.4
NGA No.
6300

Tower & Structure

Tower Height
9.5m
Tower Shape
cylindrical
Tower Color
black with one red horizontal band
Material
concrete

Structure: round hourglass-shaped concrete tower, painted black with one red horizontal band

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Seigan Shima Lighthouse at night?+
Seigan Shima displays the characteristic Fl (2) White 5s — 2 white flashes every 5 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. The white color may indicate a specific sector or warning zone.
Which ports and harbors does Seigan Shima Lighthouse guide vessels into?+
Seigan Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Toba at 0.9 NM to the WSW. Other ports served include Suga (1.9 NM ENE), Matoya (7.5 NM SSE), Gokasho (11.8 NM SW), Hamajima (12.4 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seigan Shima Lighthouse still active and maintained?+
Yes, Seigan Shima 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 Seigan Shima Lighthouse?+
Seigan Shima 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 Seigan Shima Lighthouse?+
You can track vessels near Seigan Shima 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.