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Osaka-yamatogawa Lighthouse

Iso G 4s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Osaka-yamatogawa Lighthouse

This seasonal lighthouse features a 15-meter fiberglass pipe swing pole structure painted green. Its light emits an isophase green signal. The focal height matches the tower height at 15 meters. This aid provides a geographic range of 12 nautical miles and is currently operational.

Light & Optic

Characteristic Signature
Iso G 4s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Iso
Focal Height
15m
Light Range
5NM (9.3 km)
Geographic Range
12NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.6107°
Longitude
135.4013°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
15m
Tower Color
green
Material
fiberglass

Structure: Pipe swing pole; 16. Seasonal

References & Identifiers

Admiralty No.
M5940
NGA No.
7304
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Frequently Asked Questions

How far offshore can Osaka-yamatogawa Lighthouse be seen?+
With a focal height of 15 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Osaka-yamatogawa 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-yamatogawa Lighthouse at night?+
Osaka-yamatogawa displays the characteristic Iso G 4s — 1 green flash every 4 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-yamatogawa Lighthouse guide vessels into?+
Osaka-yamatogawa Lighthouse assists vessels approaching 5 nearby ports. The closest is Osaka, Tottori at 2.8 NM to the NE. Other ports served include Sakaisenboku (4 NM SSE), Sakai (4.7 NM S), Amagasaki (5.4 NM N), Nishinomiya (5.4 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Osaka-yamatogawa Lighthouse still active and maintained?+
Yes, Osaka-yamatogawa 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-yamatogawa Lighthouse?+
Osaka-yamatogawa 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-yamatogawa Lighthouse?+
You can track vessels near Osaka-yamatogawa 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.