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Tanezaki Breakwater Lighthouse

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

Location & Light Range

About Tanezaki Breakwater Lighthouse

This concrete lighthouse stands 30 meters tall on the Tanezaki Breakwater in Kōchi, on the southern coast of Shikoku. Its cylindrical tower is painted white with a red section at the top. The light emits a red signal, characterized by an isophase light on a 6-second cycle. This facility has been operational since its construction.

Light & Optic

Characteristic Signature
Iso R 6s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
6s
Raw Code
Iso.R. period 6s
Focal Height
12m
Geographic Range
4NM

Location

City
Kōchi (Southern Shikoku)
Country
🇯🇵JP
Latitude
33.5046°
Longitude
133.5746°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
cylindrical
Tower Color
white and red
Material
concrete

Structure: White cylindrical tower, red top; 30

References & Identifiers

Admiralty No.
M5594.8
NGA No.
10160
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Frequently Asked Questions

How do mariners identify Tanezaki Breakwater Lighthouse at night?+
Tanezaki Breakwater displays the characteristic Iso R 6s — 1 red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Tanezaki Breakwater Lighthouse guide vessels into?+
Tanezaki Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Kochi at 2.1 NM to the NNW. Other ports served include Usa/Tosa (7.4 NM WSW), Susaki (15.6 NM WSW), Kaminokae (21.3 NM SW), Nahari (22.7 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tanezaki Breakwater Lighthouse still active and maintained?+
Yes, Tanezaki 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 Tanezaki Breakwater Lighthouse?+
Tanezaki 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 Tanezaki Breakwater Lighthouse?+
You can track vessels near Tanezaki 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.