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Tosashimizu Lighthouse

Fl WR 4s🇯🇵Kōchi (Southern Shikoku), JPOperational

Location & Light Range

About Tosashimizu Lighthouse

This lighthouse stands on Southern Shikoku in Kōchi. Its white tower reaches a height of 42 meters, with the light positioned at a focal height of 46 meters. The light displays white and red sectors. A single white flash is emitted every 4 seconds.

Why it matters: This lighthouse has a geographic range of 7 nautical miles.

Light & Optic

Characteristic Signature
Fl WR 4s
Flash Type
Flashing
Light Color
WR
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W.R. period 4s
Focal Height
46m
Geographic Range
7NM

Location

City
Kōchi (Southern Shikoku)
Country
🇯🇵JP
Latitude
32.7660°
Longitude
132.9478°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
42m
Tower Color
white

Structure: White tower; 42. R. 021°-084°, W.-021°

References & Identifiers

Admiralty No.
M5604
NGA No.
10296
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Frequently Asked Questions

How do mariners identify Tosashimizu Lighthouse at night?+
Tosashimizu displays the characteristic Fl WR 4s — 1 wr flash every 4 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 wr color may indicate a specific sector or warning zone.
Which ports and harbors does Tosashimizu Lighthouse guide vessels into?+
Tosashimizu Lighthouse assists vessels approaching 5 nearby ports. The closest is Tosashimizu at 0.9 NM to the NE. Other ports served include Ashizuri (1.1 NM NNW), Kozukushi (13.5 NM WNW), Ozuku (13.6 NM WNW), Sukumowan (14.8 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tosashimizu Lighthouse still active and maintained?+
Yes, Tosashimizu 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 Tosashimizu Lighthouse?+
Tosashimizu 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 Tosashimizu Lighthouse?+
You can track vessels near Tosashimizu 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.