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Osaka Nanko Lighthouse

Fl (2) G 7s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Osaka Nanko Lighthouse

This lighthouse features a 21-meter round tower constructed from green fiberglass. The structure includes a white fiberglass hut with the light positioned at a focal height of 21 meters. It emits a green flashing light. The tower stands 21 meters tall.

Light & Optic

Characteristic Signature
Fl (2) G 7s
Flash Type
Flashing
Light Color
Green
Flash Count
2 flashes
Interval
7s
Raw Code
Fl
Focal Height
21m
Light Range
7NM (13.0 km)
Geographic Range
10NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.6287°
Longitude
135.3965°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
21m
Tower Shape
round
Tower Color
green
Material
fiberglass

Structure: White glass reinforced plastic(grp) fiberglass hut; 13. Obscured by Glennie and

References & Identifiers

Admiralty No.
M5939
NGA No.
7312
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Frequently Asked Questions

How far offshore can Osaka Nanko Lighthouse be seen?+
With a focal height of 21 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Osaka Nanko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Osaka Nanko Lighthouse at night?+
Osaka Nanko displays the characteristic Fl (2) G 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 Osaka Nanko Lighthouse guide vessels into?+
Osaka Nanko Lighthouse assists vessels approaching 5 nearby ports. The closest is Osaka, Tottori at 2.2 NM to the NE. Other ports served include Amagasaki (4.3 NM N), Nishinomiya (4.3 NM N), Sakaisenboku (5.1 NM SSE), AmagasakiNishinomiyaAshiya (5.4 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Osaka Nanko Lighthouse still active and maintained?+
Yes, Osaka Nanko 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 Osaka Nanko Lighthouse?+
Osaka Nanko 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 Osaka Nanko Lighthouse?+
You can track vessels near Osaka Nanko 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.