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Teisaki Lighthouse

Fl W 3s🇯🇵Shikoku-South coast, JPInactive

Location & Light Range

About Teisaki Lighthouse

Teisaki Lighthouse, a concrete structure standing 25 meters tall, features a round, pyramid-shaped tower. The exterior is painted white with a distinctive red top. The light emits a single white flash every 3 seconds, with a geographic range of 7 nautical miles. It is not currently operational.

Light & Optic

Characteristic Signature
Fl W 3s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
3s
Raw Code
Fl.W. period 3s
Focal Height
29m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Shikoku-South coast
Country
🇯🇵JP
Latitude
33.5208°
Longitude
133.7545°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
25m
Tower Shape
round
Tower Color
white and red
Material
concrete

Structure: White pyramid tower, red top; 25

References & Identifiers

Admiralty No.
M5593
NGA No.
10136
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Frequently Asked Questions

How far offshore can Teisaki Lighthouse be seen?+
With a focal height of 29 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Teisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Teisaki Lighthouse at night?+
Teisaki displays the characteristic Fl W 3s — 1 white flash every 3 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.
Which ports and harbors does Teisaki Lighthouse guide vessels into?+
Teisaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Kochi at 9.5 NM to the W. Other ports served include Nahari (14.4 NM ESE), Usa/Tosa (16.1 NM WSW), Murotsu, Kochi (24.2 NM SE), Susaki (24.3 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Teisaki Lighthouse still active and maintained?+
Teisaki Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
What shipping routes pass near Teisaki Lighthouse?+
Teisaki 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 Teisaki Lighthouse?+
You can track vessels near Teisaki 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.