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Motomachi Kō Lighthouse

Fl Green 4s🇯🇵Tokyo, JPOperational

Location & Light Range

About Motomachi Kō Lighthouse

Also known as: Motomati

The Motomachi Kō lighthouse, completed in 1953, is a 12-meter tall cylindrical concrete structure, painted white. Its light is positioned 14 meters above sea level and emits a flashing green signal, characterized as Fl G 4s. This light provides a range of 11.6 nautical miles. The illumination apparatus sits on a short post situated on top of the tower. Public access is permitted to the grounds, but the tower itself is not open for entry. The closest port, Ohshima in Tokyo, is 0.3 kilometers distant.

Why it matters: This lighthouse serves as a primary navigation aid for vessels approaching and departing Motomachi Port.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
14m
Geographic Range
11.6NM

Construction & History

Year Built
1953

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical white concrete tower; the light is displayed from a short post atop the tower

Location

City
Tokyo
Country
🇯🇵Japan
Region
Oshima Subprefecture
Sea Region
Motomachi Port, Japan
Latitude
34.7518°
Longitude
139.3518°

References & Identifiers

Nearest Port
Ohshima, Tokyo(0.3 km)
ARLHS No.
JPN-1465
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Frequently Asked Questions

How do mariners identify Motomachi Kō Lighthouse at night?+
Motomachi Kō 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 Motomachi Kō Lighthouse guide vessels into?+
Motomachi Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Okada at 2.9 NM to the NE. Other ports served include Nishitokyo (9 NM E), Toshima/Tokyo (14.7 NM SSW), Inatori (15.2 NM W), Itoh, Shizuoka (18.2 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Motomachi Kō Lighthouse still active and maintained?+
Yes, Motomachi Kō 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 Motomachi Kō Lighthouse?+
Motomachi Kō 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 Motomachi Kō Lighthouse?+
You can track vessels near Motomachi Kō 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.