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Gaiko North Breakwater Lighthouse

Fl (2) Green 7s🇯🇵Osaka, JPOperational

Location & Light Range

About Gaiko North Breakwater Lighthouse

This cylindrical concrete lighthouse stands 19 meters tall at the end of the north breakwater, marking the entrance to Ōsaka's south harbor. Its lantern and gallery are situated atop the tower. The structure's focal height reaches 21 meters above sea level. It emits a green light that flashes every 7 seconds. The lighthouse is located 1.3 kilometers from the nearest port, Osaka, and has a geographic range of 13.4 nautical miles. It remains operational, guiding vessels in this busy maritime area.

Why it matters: This lighthouse is essential for the safe navigation of vessels entering and exiting Ōsaka's south harbor, supporting the region's economic activity by facilitating smooth transit into the port's busy channels.

Light & Optic

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

Location

City
Osaka
Country
🇯🇵Japan
Region
Osaka Prefecture
Sea Region
End of the breakwater on the north side of the entrance to Ōsaka's south harbor.
Latitude
34.6276°
Longitude
135.3965°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: round concrete tower with lantern and gallery

References & Identifiers

Nearest Port
Osaka(1.3 km)
Admiralty No.
M5939
NGA No.
7312
ARLHS No.
JPN-1920
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Frequently Asked Questions

How do mariners identify Gaiko North Breakwater Lighthouse at night?+
Gaiko North Breakwater displays the characteristic Fl (2) Green 7s — 2 green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Gaiko North Breakwater Lighthouse guide vessels into?+
Gaiko North Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Osaka, Tottori at 2.3 NM to the NE. Other ports served include Amagasaki (4.4 NM N), Nishinomiya (4.4 NM N), Sakaisenboku (5 NM SSE), AmagasakiNishinomiyaAshiya (5.4 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gaiko North Breakwater Lighthouse still active and maintained?+
Yes, Gaiko North 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 North Breakwater Lighthouse?+
Gaiko North 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 North Breakwater Lighthouse?+
You can track vessels near Gaiko North 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.