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Sekisaki Lighthouse

Iso W 6s🇯🇵Seto Naikai Western, JPOperational

Location & Light Range

About Sekisaki Lighthouse

Also known as: Sekisaki Lighthouse

The Sekisaki Lighthouse is a round, metal tower constructed in 1901. It stands 70 meters tall and displays an isophase white light that completes a cycle every 6 seconds. This lighthouse is situated in the Seto Naikai Western region. Its geographic range extends to 12 nautical miles.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
70m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Construction & History

Year Built
1901

References & Identifiers

Admiralty No.
M4946
NGA No.
9308
Wikipedia
Read on Wikipedia →
Wikidata
Q11655691 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Shape
round
Tower Color
white
Material
metal

Structure: White pile. BARROW ISLAND:

Location

City
Seto Naikai Western
Country
🇯🇵JP
Latitude
33.2655°
Longitude
131.8996°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Sekisaki Lighthouse be seen?+
With a focal height of 70 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Sekisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Sekisaki Lighthouse at night?+
Sekisaki displays the characteristic Iso W 6s — 1 white flash every 6 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.
Which ports and harbors does Sekisaki Lighthouse guide vessels into?+
Sekisaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Saganoseki at 1.9 NM to the SW. Other ports served include Usuki (9.4 NM SSW), Tsukumi (11.1 NM S), Oita (11.7 NM W), Misaki, Ehime (12.8 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sekisaki Lighthouse still active and maintained?+
Yes, Sekisaki 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 Sekisaki Lighthouse?+
Sekisaki 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 Sekisaki Lighthouse?+
You can track vessels near Sekisaki 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.