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Tosamurotsu Kō Lighthouse

Fl Green 6s🇯🇵Muroto, JPOperational

Location & Light Range

About Tosamurotsu Kō Lighthouse

Also known as: Tosamurotsu Kō (North Jetty)

This concrete lighthouse, with a white, cylindrical, hourglass-shaped tower, stands 8.5 meters tall. Its focal height reaches 11 meters above sea level. The light emits a single green flash every 6 seconds, visible for 10.7 nautical miles. It is situated at the end of the north inner breakwater in Muroto, Kochi Prefecture, Japan. The nearest port, Murotsu, is 0.2 kilometers away. The lighthouse is operational and guides vessels into the local harbor.

Why it matters: This light marks the end of the north inner breakwater, aiding safe entry into Muroto harbor for fishing fleets and commercial traffic.

Light & Optic

Characteristic Signature
Fl Green 6s
Flash Type
Flashing
Light Color
Green
Interval
6s
Raw Code
Fl G 6s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Muroto
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Located at the end of the north inner breakwater of Muroto.
Latitude
33.2861°
Longitude
134.1445°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: round hourglass-shaped concrete tower

References & Identifiers

Nearest Port
Murotsu, Kochi(0.2 km)
Admiralty No.
M5590
NGA No.
10104
ARLHS No.
JPN-2497
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Frequently Asked Questions

How do mariners identify Tosamurotsu Kō Lighthouse at night?+
Tosamurotsu Kō 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 Tosamurotsu Kō Lighthouse guide vessels into?+
Tosamurotsu Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Murotsu, Kochi at 0.1 NM to the SSE. Other ports served include Nahari (10.4 NM NW), Kannoura (17.4 NM NNE), Asakawa (23.5 NM NNE), Kochi (32.7 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tosamurotsu Kō Lighthouse still active and maintained?+
Yes, Tosamurotsu 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 Tosamurotsu Kō Lighthouse?+
Tosamurotsu 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 Tosamurotsu Kō Lighthouse?+
You can track vessels near Tosamurotsu 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.