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Oshima Lighthouse

Fl (2) White 9s🇯🇵Sakai, JPOperational

Location & Light Range

About Oshima Lighthouse

Established in 1954, the Oshima lighthouse is a white, cylindrical concrete post standing 11 meters tall. It is attached to a rectangular concrete equipment shelter. The lighthouse is situated on an island approximately 5 kilometers north of Hukui, connected to the mainland by a footbridge. Its light emits a white flash every nine seconds, with a focal height of 39 meters. The geographic range of its light is 16.9 nautical miles. The site is open to the public, though the tower itself remains closed.

Why it matters: The Oshima lighthouse marks the island and cape for vessels navigating the coast north of Hukui, an area where the mainland meets an offshore island. Its design is a recognizable landmark for both mariners and observers on land.

Light & Optic

Characteristic Signature
Fl (2) White 9s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
9s
Raw Code
Fl W 9s
Focal Height
39m
Geographic Range
16.9NM

Construction & History

Year Built
1954

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: A 11m white cylindrical concrete post with lantern, attached to one corner of a rectangular concrete equipment shelter.

Location

City
Sakai
Country
🇯🇵Japan
Region
Fukui Prefecture
Sea Region
Located on an island just off a cape about 5 km (3 mi) north of Hukui. The island is connected to the mainland by a footbridge.
Latitude
36.2512°
Longitude
136.1184°

References & Identifiers

Nearest Port
Fukui(2.7 km)
Admiralty No.
M7239.7
ARLHS No.
JPN-442
Wikidata
Q11659211 →
OpenStreetMap
View on OSM →
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Frequently Asked Questions

How do mariners identify Oshima Lighthouse at night?+
Oshima displays the characteristic Fl (2) White 9s — 2 white flashes every 9 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 Oshima Lighthouse guide vessels into?+
Oshima Lighthouse assists vessels approaching 5 nearby ports. The closest is Fukui at 2.9 NM to the SSE. Other ports served include Takasu, Fukui (11.8 NM SSE), Ukui (11.8 NM SSE), Ataka (17.5 NM NE), Kanazawa (31.7 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Oshima Lighthouse still active and maintained?+
Yes, Oshima 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 Oshima Lighthouse?+
Oshima 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 Oshima Lighthouse?+
You can track vessels near Oshima 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.