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Yoroisaki Lighthouse

Iso W 6s🇯🇵Honshu-South Coast, JPOperational

Location & Light Range

About Yoroisaki Lighthouse

Yoroisaki lighthouse is an operational aid on Honshu-South Coast. The white tower measures 30 meters in height, with its light positioned 26 meters above sea level. It displays an isophase white light, repeating its cycle every 6 seconds. This light has a geographic range of 5 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
26m
Light Range
5NM (9.3 km)
Geographic Range
5NM

Location

City
Honshu-South Coast
Country
🇯🇵JP
Latitude
34.4133°
Longitude
136.9279°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Color
white

Structure: White tower; 30

References & Identifiers

Admiralty No.
M6045
NGA No.
6344
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Frequently Asked Questions

How far offshore can Yoroisaki Lighthouse be seen?+
With a focal height of 26 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Yoroisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Yoroisaki Lighthouse at night?+
Yoroisaki 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 Yoroisaki Lighthouse guide vessels into?+
Yoroisaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Matoya at 3.4 NM to the SSW. Other ports served include Suga (5.4 NM NNW), Toba (5.7 NM NW), Hamajima (10.9 NM SW), Gokasho (12.2 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yoroisaki Lighthouse still active and maintained?+
Yes, Yoroisaki 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 Yoroisaki Lighthouse?+
Yoroisaki 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 Yoroisaki Lighthouse?+
You can track vessels near Yoroisaki 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.