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Kashiwa Shima Breakwater Lighthouse

Oc Red 6s🇯🇵Karatsu, JPOperational

Location & Light Range

About Kashiwa Shima Breakwater Lighthouse

This lighthouse stands at the terminus of Kashiwa Shima's main southern breakwater, guiding maritime traffic in the vicinity of Karatsu. The structure consists of a concrete post atop a one-story square concrete equipment building, reaching a focal height of 11 meters above the water. Its red concrete tower measures 8.5 meters tall and emits an occulting red light, appearing once every 6 seconds. This light offers a geographic range of 10.7 nautical miles. The site is accessible to the public, though the tower itself is closed. It is located approximately 0.1 kilometers from the nearest port, Kashikojima.

Why it matters: This light is essential for mariners approaching Kashiwa Shima, marking the end of the main southern breakwater and guiding vessels safely into the harbor, thereby preventing collisions with the structure and submerged dangers.

Light & Optic

Characteristic Signature
Oc Red 6s
Flash Type
Occulting
Light Color
Red
Interval
6s
Raw Code
Oc R 6s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Karatsu
Country
🇯🇵Japan
Region
Saga Prefecture
Sea Region
Kashiwa Shima, at the end of its south (main) breakwater.
Latitude
33.5377°
Longitude
129.9670°

References & Identifiers

Nearest Port
Kashikojima(0.1 km)
Admiralty No.
M5269.04
NGA No.
12236
ARLHS No.
JPN-2350

Tower & Structure

Tower Height
8.5m
Tower Shape
square
Tower Color
red
Material
concrete

Structure: concrete post attached to a square 1-story concrete equipment building

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 Kashiwa Shima Breakwater Lighthouse at night?+
Kashiwa Shima Breakwater displays the characteristic Oc Red 6s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Kashiwa Shima Breakwater Lighthouse guide vessels into?+
Kashiwa Shima Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Karatsu at 3.3 NM to the S. Other ports served include Tobo (3.7 NM SSW), Yobuko (3.7 NM W), Kafuri (9.6 NM E), Fukushima, Nagasaki (14 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kashiwa Shima Breakwater Lighthouse still active and maintained?+
Yes, Kashiwa Shima Breakwater 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 Kashiwa Shima Breakwater Lighthouse?+
Kashiwa Shima Breakwater 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 Kashiwa Shima Breakwater Lighthouse?+
You can track vessels near Kashiwa Shima Breakwater 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.