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Shiroshima Saki Lighthouse

Fl White 15s🇯🇵Okinoshima, JPOperational

Location & Light Range

About Shiroshima Saki Lighthouse

Also known as: Shiroshima Saki (Oki Syoto)

The Shiroshima Saki lighthouse, a cylindrical concrete tower standing 16 meters tall, was first lit in 1956. Its lantern and gallery sit atop a keeper's house, also made of concrete. The lighthouse is situated on a summit at the northern tip of Dōgo island, providing a focal height of 258 meters. This elevated position allows its white light to have a geographic range of 37.7 nautical miles. A renovation in 1981 converted the keeper's house into a radio direction finding station. The site is open to the public, though the tower remains closed.

Why it matters: Distinguished as one of the highest lighthouses in Asia, Shiroshima Saki's powerful white flash every 15 seconds offers significant guidance for vessels navigating the waters around Dōgo island.

Light & Optic

Characteristic Signature
Fl White 15s
Flash Type
Flashing
Light Color
White
Interval
15s
Raw Code
Fl W 15s
Focal Height
258m
Light Range
37.53NM (69.5 km)
Geographic Range
37.7NM

Construction & History

Year Built
1956

Significant events: renovated in 1981, keeper's house converted into a radio direction finding station

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
16m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery, rising from a 1-story concrete keeper's house

Location

City
Okinoshima
Country
🇯🇵Japan
Region
Shimane Prefecture
Sea Region
Located on a summit at the northern tip of Dōgo island, Japan
Latitude
36.3392°
Longitude
133.2821°

References & Identifiers

Nearest Port
Okinokojima(8.6 km)
Admiralty No.
M7321.25
NGA No.
2036
ARLHS No.
JPN-585
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Frequently Asked Questions

How far offshore can Shiroshima Saki Lighthouse be seen?+
With a focal height of 258 meters and a nominal range of 37.53 nautical miles (approximately 69.5 km), Shiroshima Saki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Shiroshima Saki Lighthouse at night?+
Shiroshima Saki displays the characteristic Fl White 15s. 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 Shiroshima Saki Lighthouse guide vessels into?+
Shiroshima Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Oki at 8.3 NM to the SSE. Other ports served include Ama, Hyogo (17 NM SSW), Nakanoshima (17.2 NM SW), Chichii (17.7 NM SSW), Beppu, Shimane (18 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Shiroshima Saki Lighthouse still active and maintained?+
Yes, Shiroshima Saki 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 Shiroshima Saki Lighthouse?+
Shiroshima Saki 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 Shiroshima Saki Lighthouse?+
You can track vessels near Shiroshima Saki 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.