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Ko Shima Lighthouse

Fl White 5s🇯🇵Yawatahama, JPOperational

Location & Light Range

About Ko Shima Lighthouse

Also known as: Ko Shima (Kojima)

This white, cylindrical concrete lighthouse stands 11 meters tall on a small islet approximately 15 kilometers southwest of Yawatahama, Japan. Its gallery is situated on a round concrete tower. The light emits a single white flash every 5 seconds, visible for 11 nautical miles. The site is open to visitors, but access to the tower itself is restricted. The nearest port, Ohshima, Ehime, is 1.4 kilometers away. This navigational aid has been operational for many years.

Why it matters: The lighthouse marks the islet southwest of Yawatahama, providing a necessary navigational reference for vessels operating in these coastal waters.

Light & Optic

Characteristic Signature
Fl White 5s
Flash Type
Flashing
Light Color
White
Interval
5s
Raw Code
Fl W 5s
Focal Height
12m
Geographic Range
11NM

Location

City
Yawatahama
Country
🇯🇵Japan
Region
Ehime Prefecture
Sea Region
on an islet about 15 km southwest of Yawatahama, Japan.
Latitude
33.3768°
Longitude
132.3679°

References & Identifiers

Nearest Port
Ohshima, Ehime(1.4 km)
Admiralty No.
M5622.7
NGA No.
10388
ARLHS No.
JPN-2392

Tower & Structure

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

Structure: round white concrete tower with gallery

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ko Shima Lighthouse at night?+
Ko Shima displays the characteristic Fl White 5s. 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 Ko Shima Lighthouse guide vessels into?+
Ko Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Mikame at 5 NM to the NNE. Other ports served include Yawatahama (5.4 NM NNE), Kawanoishi (5.8 NM NNE), Ikata (6.4 NM N), MITSUKE (7.7 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ko Shima Lighthouse still active and maintained?+
Yes, Ko Shima 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 Ko Shima Lighthouse?+
Ko Shima 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 Ko Shima Lighthouse?+
You can track vessels near Ko Shima 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.