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Saga Kō Groin Lighthouse

Fl Green 6s🇯🇵Kuroshio, JPOperational

Location & Light Range

About Saga Kō Groin Lighthouse

Also known as: Tosasaga

This cylindrical concrete tower, standing 12 meters tall, is attached to a square equipment shelter and marks the end of a groin or breakwater at Saga Port. The lighthouse emits a single green flash every six seconds from a focal height of 20 meters, providing a visual cue for mariners. Its operational light has a geographic range of 13.2 nautical miles. The structure is located within the city of Kuroshio in Kochi Prefecture, Japan, a short distance from the nearest port facilities.

Why it matters: The lighthouse is essential for the safe navigation of vessels entering and exiting Saga Port, guiding them through the harbor entrance. Its green flashes specifically mark the channel or the end of a protective structure, preventing groundings and ensuring efficient maritime traffic flow for local and commercial shipping.

Light & Optic

Characteristic Signature
Fl Green 6s
Flash Type
Flashing
Light Color
Green
Interval
6s
Raw Code
Fl G 6s
Focal Height
20m
Geographic Range
13.2NM

Location

City
Kuroshio
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Located at Saga (Tosasaga) Port in Japan, likely marking the end of a groin or breakwater.
Latitude
33.0760°
Longitude
133.1205°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
cylindrical
Material
concrete

Structure: round cylindrical concrete tower attached to a square equipment shelter

References & Identifiers

Nearest Port
Saga(0.2 km)
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Frequently Asked Questions

How do mariners identify Saga Kō Groin Lighthouse at night?+
Saga Kō Groin displays the characteristic Fl Green 6s. 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 Saga Kō Groin Lighthouse guide vessels into?+
Saga Kō Groin Lighthouse assists vessels approaching 5 nearby ports. The closest is Saga at 0.4 NM to the WSW. Other ports served include Kaminokae (13.7 NM NNE), Tosashimizu (19.8 NM SSW), Ashizuri (19.9 NM SSW), Susaki (20.9 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Saga Kō Groin Lighthouse still active and maintained?+
Yes, Saga Kō Groin 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 Saga Kō Groin Lighthouse?+
Saga Kō Groin 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 Saga Kō Groin Lighthouse?+
You can track vessels near Saga Kō Groin 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.