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Gaiko South Breakwater Lighthouse

Fl (2) Red 7s🇯🇵Osaka, JPOperational

Location & Light Range

About Gaiko South Breakwater Lighthouse

This red, cylindrical concrete tower stands 19 meters tall at the end of Gaiko South Breakwater, marking the southern side of the entrance to Osaka's south harbor. With a focal height of 21 meters, it emits a red light with a characteristic of one flash every 7 seconds. This structure, featuring a lantern and gallery, is situated approximately 1 kilometer from the nearest port. The lighthouse has been operational, guiding vessels toward Osaka, a major industrial and commercial center.

Why it matters: This lighthouse is essential for the safe passage of all ships utilizing Osaka's south harbor, clearly marking the southern boundary of the entrance channel.

Light & Optic

Characteristic Signature
Fl (2) Red 7s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
7s
Raw Code
Fl R 7s
Focal Height
21m
Geographic Range
13.4NM

Location

City
Osaka
Country
🇯🇵Japan
Region
Osaka Prefecture
Sea Region
Located at the end of the breakwater on the south side of the entrance to Ōsaka's south harbor.
Latitude
34.6284°
Longitude
135.3895°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
19m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round concrete tower with lantern and gallery

References & Identifiers

Nearest Port
Osaka(1.0 km)
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Frequently Asked Questions

How do mariners identify Gaiko South Breakwater Lighthouse at night?+
Gaiko South Breakwater displays the characteristic Fl (2) Red 7s — 2 red flashes every 7 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. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Gaiko South Breakwater Lighthouse guide vessels into?+
Gaiko South Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Osaka, Tottori at 2.5 NM to the ENE. Other ports served include Amagasaki (4.3 NM N), Nishinomiya (4.3 NM N), Sakaisenboku (5.2 NM SSE), AmagasakiNishinomiyaAshiya (5.5 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gaiko South Breakwater Lighthouse still active and maintained?+
Yes, Gaiko South 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 Gaiko South Breakwater Lighthouse?+
Gaiko South 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 Gaiko South Breakwater Lighthouse?+
You can track vessels near Gaiko South 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.