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Yoko Sone Lighthouse

Fl (6) White 15s🇯🇵Saikai, JPOperational

Location & Light Range

About Yoko Sone Lighthouse

This lighthouse, established in 1987, stands on an isolated rock situated 25 kilometers west-southwest of Mitoko Shima. The 24-meter tower has its upper half painted yellow and its lower half black, a distinct visual against the sea. Its light emits a white flash every 15 seconds. While the site is accessible by boat, the tower itself is closed to the public. The lighthouse is located in Saikai, within Japan's Nagasaki Prefecture, and operates from a remote position approximately 8.5 kilometers from the nearest port, Enohama.

Why it matters: The lighthouse marks a significant navigational hazard represented by the isolated rock it occupies, west-southwest of Mitoko Shima.

Light & Optic

Characteristic Signature
Fl (6) White 15s
Flash Type
Flashing
Light Color
White
Flash Count
6 flashes
Interval
15s
Raw Code
Fl W 15s
Focal Height
23m
Geographic Range
13.8NM

Construction & History

Year Built
1987

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
24m
Tower Color
Upper half yellow, lower half black

Structure: A 24m tower with its upper half painted yellow and lower half black.

Location

City
Saikai
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
Isolated rock 25 km west southwest of Mitoko Shima
Latitude
32.9602°
Longitude
129.3418°

References & Identifiers

Nearest Port
Enohama(8.5 km)
Admiralty No.
M5224.5
NGA No.
11906
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Frequently Asked Questions

How do mariners identify Yoko Sone Lighthouse at night?+
Yoko Sone displays the characteristic Fl (6) White 15s — 6 white flashes 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. The white color may indicate a specific sector or warning zone.
Which ports and harbors does Yoko Sone Lighthouse guide vessels into?+
Yoko Sone Lighthouse assists vessels approaching 5 nearby ports. The closest is Matsuura, Nagasaki at 13.1 NM to the E. Other ports served include Nanatsugama (13.1 NM E), Sakito (13.1 NM E), Matsushima, Nagasaki (13.2 NM E), Aokata (13.9 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yoko Sone Lighthouse still active and maintained?+
Yes, Yoko Sone 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 Yoko Sone Lighthouse?+
Yoko Sone 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 Yoko Sone Lighthouse?+
You can track vessels near Yoko Sone 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.