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Tei Saki Lighthouse

Oc White 6s🇯🇵Konan, JPOperational

Location & Light Range

About Tei Saki Lighthouse

Constructed in 1958, Tei Saki Lighthouse is a 11.5-meter-tall cylindrical concrete tower painted white. It features a distinctive round, vase-like shape with four ribs, mounted atop a single-story equipment room. The lighthouse's focal height reaches 29 meters, and it emits an occulting white light with a 6-second cycle. Situated on a promontory near the northern edge of Tosa Bay, approximately 12 kilometers west of Aki, it offers a geographic range of 15.1 nautical miles. The site is accessible by road, though the tower itself is not open to the public.

Why it matters: Tei Saki Lighthouse marks the northernmost point of Tosa Bay and is architecturally unique due to its vase-shaped tower with four ribs.

Light & Optic

Characteristic Signature
Oc White 6s
Flash Type
Occulting
Light Color
White
Interval
6s
Raw Code
Oc W 6s
Focal Height
29m
Geographic Range
15.1NM

Construction & History

Year Built
1958

References & Identifiers

Nearest Port
Kochi(8.4 km)
Admiralty No.
M5593
NGA No.
10136
ARLHS No.
JPN-638

Tower & Structure

Tower Height
11.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round vase-shaped concrete tower with gallery and four ribs mounted on a 1-story equipment room

Location

City
Konan
Country
🇯🇵Japan
Region
Kochi Prefecture
Sea Region
Located on a promontory near the northernmost point of Tosa Bay, about 12 km west of Aki.
Latitude
33.5209°
Longitude
133.7545°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Tei Saki Lighthouse at night?+
Tei Saki displays the characteristic Oc White 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Tei Saki Lighthouse guide vessels into?+
Tei Saki 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 Tei Saki Lighthouse still active and maintained?+
Yes, Tei Saki 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 Tei Saki Lighthouse?+
Tei Saki 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 Tei Saki Lighthouse?+
You can track vessels near Tei Saki 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.