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Tosashimizu Lighthouse

Iso G 6s🇯🇵Kōchi (Southern Shikoku), JPOperational

Location & Light Range

About Tosashimizu Lighthouse

Tosashimizu is an operational lighthouse situated near Kōchi on Southern Shikoku. The light features an isophase green signal on a 6-second cycle. Its focal height reaches 16 meters above sea level. The lighthouse provides a geographic range of 4 nautical miles for mariners.

Light & Optic

Characteristic Signature
Iso G 6s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
6s
Raw Code
Iso.G. period 6s
Focal Height
16m
Geographic Range
4NM

References & Identifiers

Admiralty No.
M5607.3
NGA No.
10292

Location

City
Kōchi (Southern Shikoku)
Country
🇯🇵JP
Latitude
32.7786°
Longitude
132.9348°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Tosashimizu Lighthouse at night?+
Tosashimizu displays the characteristic Iso G 6s — 1 green flash every 6 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 green 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 Ashizuri at 0.3 NM to the NE. Other ports served include Tosashimizu (1.4 NM E), Kozukushi (12.5 NM WNW), Ozuku (12.7 NM WNW), Sukumowan (13.8 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.