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Sano Gyoko Lighthouse

Fl Green 4s🇯🇵Izumisano, JPOperational

Location & Light Range

About Sano Gyoko Lighthouse

Established in 1961, this cylindrical concrete lighthouse stands 8.5 meters tall on the north breakwater of Izumisano's yacht harbor. Its focal height reaches 13 meters, casting a green flash every 4 seconds. The structure is a round concrete tower, flaring slightly at the top, connected to a small equipment shelter. It marks the end of the breakwater, offering a geographic range of 11.3 nautical miles. The site is accessible to visitors, though the tower itself remains closed.

Why it matters: This lighthouse is essential for safe navigation into the Sano yacht harbor, marking the north breakwater's end to prevent groundings and collisions, particularly for recreational yachts and fishing boats.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
13m
Geographic Range
11.3NM

Construction & History

Year Built
1961

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower, flared at the top, attached to a small equipment shelter

Location

City
Izumisano
Country
🇯🇵Japan
Region
Osaka Prefecture
Sea Region
Located at the end of the north breakwater of a yacht harbor just north of the bridge to the airport.
Latitude
34.4232°
Longitude
135.3155°

References & Identifiers

Nearest Port
Izumisano(1.4 km)
Admiralty No.
M5957.4
NGA No.
7236
ARLHS No.
JPN-1909
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Frequently Asked Questions

How do mariners identify Sano Gyoko Lighthouse at night?+
Sano Gyoko displays the characteristic Fl Green 4s. 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 Sano Gyoko Lighthouse guide vessels into?+
Sano Gyoko Lighthouse assists vessels approaching 5 nearby ports. The closest is KAIZUKA at 2.7 NM to the NE. Other ports served include Hannan (3.1 NM NNE), Sensyu (3.3 NM W), Sakai (8.2 NM NE), Tannowa (8.2 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sano Gyoko Lighthouse still active and maintained?+
Yes, Sano Gyoko 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 Sano Gyoko Lighthouse?+
Sano Gyoko 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 Sano Gyoko Lighthouse?+
You can track vessels near Sano Gyoko 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.