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To Shima Breakwater Lighthouse

Fl Red 3s🇯🇵Tokyo, JPOperational

Location & Light Range

About To Shima Breakwater Lighthouse

Also known as: Toshima

This red, cylindrical concrete tower stands 7 meters tall and emits a red light with a focal height of 10 meters. Its distinctive warning signal consists of a single red flash every 3 seconds. Located at the seaward end of the To Shima Breakwater, it marks the harbor's entrance. The lighthouse has a geographic range of 10.4 nautical miles. The site is open to the public, though the tower itself is closed.

Why it matters: The lighthouse is essential for the safe navigation of local vessels entering and exiting the harbor. Its red flash warns mariners of the breakwater's end, preventing groundings or collisions in this busy coastal area.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
10m
Geographic Range
10.4NM

Location

City
Tokyo
Country
🇯🇵Japan
Region
Oshima Subprefecture
Sea Region
Located on the To Shima (Toshima) Breakwater in Japan.
Latitude
34.5345°
Longitude
139.2806°

References & Identifiers

Nearest Port
Toshima Tokyo(0.1 km)
Admiralty No.
M6273.55.

Tower & Structure

Tower Height
7m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round cylindrical concrete tower, painted red

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify To Shima Breakwater Lighthouse at night?+
To Shima Breakwater displays the characteristic Fl Red 3s. 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 To Shima Breakwater Lighthouse guide vessels into?+
To Shima Breakwater 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 To Shima Breakwater Lighthouse still active and maintained?+
Yes, To Shima Breakwater 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 To Shima Breakwater Lighthouse?+
To Shima Breakwater 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 To Shima Breakwater Lighthouse?+
You can track vessels near To Shima Breakwater 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.