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Iyo-kashima Lighthouse

Fl W 4s🇯🇵Bungo Suido, JPOperational

Location & Light Range

About Iyo-kashima Lighthouse

This lighthouse features a round metal tower painted white with a red cupola. It reaches a height of 108 meters, with the light source situated at 37 meters above sea level. The navigational light is white, producing a single flash every 4 seconds. This structure is located in Bungo Suido, Japan.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 4s
Focal Height
37m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Bungo Suido
Country
🇯🇵JP
Latitude
32.9453°
Longitude
132.4580°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
108m
Tower Shape
round
Tower Color
white and red
Material
metal

Structure: White round metal tower, red cupola; 108

References & Identifiers

Admiralty No.
M5612.1
NGA No.
10488
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Frequently Asked Questions

How far offshore can Iyo-kashima Lighthouse be seen?+
With a focal height of 37 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Iyo-kashima 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 Iyo-kashima Lighthouse at night?+
Iyo-kashima displays the characteristic Fl W 4s — 1 white flash every 4 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 Iyo-kashima Lighthouse guide vessels into?+
Iyo-kashima Lighthouse assists vessels approaching 5 nearby ports. The closest is Misho at 4.3 NM to the ENE. Other ports served include Fukaura, Ehime (7.1 NM E), Iwamatsu (11.2 NM NNE), Ikeshima (11.7 NM E), Sukumowan (13.1 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Iyo-kashima Lighthouse still active and maintained?+
Yes, Iyo-kashima 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 Iyo-kashima Lighthouse?+
Iyo-kashima 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 Iyo-kashima Lighthouse?+
You can track vessels near Iyo-kashima 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.