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Hira Shima Kō Breakwater Lighthouse

Fl Red 3s🇯🇵Saikai, JPOperational

Location & Light Range

About Hira Shima Kō Breakwater Lighthouse

This lighthouse is a cylindrical concrete tower standing 24 meters tall on the south breakwater of Hira Shima harbor in Saikai, Nagasaki Prefecture. It emits a single red flash every three seconds. The structure, which has a focal height of 17 meters, was formerly a taller tower with a lantern and gallery. Its geographic range is 12.4 nautical miles. The site is open to the public, but the tower itself is closed. The nearest port is Enohama, 2.9 kilometers away.

Why it matters: This light marks the entrance to Hira Shima harbor, guiding local fishing fleets and cargo ships.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
17m
Geographic Range
12.4NM

Location

City
Saikai
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
Hira Shima harbor, on its south breakwater.
Latitude
32.9981°
Longitude
129.2340°

References & Identifiers

Nearest Port
Enohama(2.9 km)
Admiralty No.
M5013.4
NGA No.
12784
ARLHS No.
JPN-2153

Tower & Structure

Tower Height
24m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round cylindrical concrete tower formerly with lantern and 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 Hira Shima Kō Breakwater Lighthouse at night?+
Hira Shima Kō Breakwater displays the characteristic Fl Red 3s. 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 Hira Shima Kō Breakwater Lighthouse guide vessels into?+
Hira Shima Kō Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Aokata at 8.5 NM to the W. Other ports served include Arikawa (8.5 NM W), Enokizu (8.5 NM W), Kata (8.5 NM W), Kozera (8.5 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Hira Shima Kō Breakwater Lighthouse still active and maintained?+
Yes, Hira Shima Kō 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 Hira Shima Kō Breakwater Lighthouse?+
Hira Shima Kō 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 Hira Shima Kō Breakwater Lighthouse?+
You can track vessels near Hira Shima Kō 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.