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Toshima Ko Lighthouse

Fl R 3s🇯🇵Nanpo-Shoto, JPOperational

Location & Light Range

About Toshima Ko Lighthouse

This metal framework tower stands 30 meters tall and is painted red. Its round structure supports a light with a focal height of 10 meters. The white light emits a single flash every 6 seconds, providing a geographic range of 19 nautical miles. The lighthouse is operational and made of metal.

Light & Optic

Characteristic Signature
Fl R 3s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
3s
Raw Code
Fl.W. period 6s
Focal Height
10m
Light Range
3NM (5.6 km)
Geographic Range
19NM

Location

City
Nanpo-Shoto
Country
🇯🇵JP
Latitude
34.5345°
Longitude
139.2805°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
round
Tower Color
red
Material
metal

Structure: Metal framework tower; 30

References & Identifiers

Admiralty No.
M6273.5
NGA No.
5552
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Frequently Asked Questions

How far offshore can Toshima Ko Lighthouse be seen?+
With a focal height of 10 meters and a nominal range of 3 nautical miles (approximately 5.6 km), Toshima Ko 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 Toshima Ko Lighthouse at night?+
Toshima Ko displays the characteristic Fl R 3s — 1 red flash every 3 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Toshima Ko Lighthouse guide vessels into?+
Toshima Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Toshima/Tokyo at 1.3 NM to the SSW. Other ports served include Okada (16.3 NM NNE), Nishitokyo (17.3 NM NE), Shimoda, Shizuoka (17.9 NM WNW), Inatori (18.5 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Toshima Ko Lighthouse still active and maintained?+
Yes, Toshima Ko 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 Toshima Ko Lighthouse?+
Toshima Ko 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 Toshima Ko Lighthouse?+
You can track vessels near Toshima Ko 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.