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Zeku Iwa Lighthouse

Mo Red 8s🇯🇵Yawatahama, JPOperational

Location & Light Range

About Zeku Iwa Lighthouse

A cylindrical concrete tower, 10 meters in height, stands on a skerry at the southern edge of the approach to Yawatahama. The lighthouse emits a red light with a distinctive flash pattern of one short and one long flash every eight seconds. This light originates from a focal height of 13 meters, providing a geographic range of 11.3 nautical miles. The site is accessible, though the tower itself is closed to visitors. The nearest port is Kawanazu, located 1.3 kilometers away.

Why it matters: This lighthouse is indispensable for maritime traffic navigating the approach to Yawatahama, specifically warning ships about the hazardous skerry and promontory it occupies. Its unique flash characteristic provides a distinct identifier for mariners, preventing confusion with other lights in the area.

Light & Optic

Characteristic Signature
Mo Red 8s
Flash Type
Morse
Light Color
Red
Interval
8s
Raw Code
Mo(A) R 8s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Yawatahama
Country
🇯🇵Japan
Region
Ehime Prefecture
Sea Region
Located on a skerry at the tip of the promontory on the south side of the approach to Yawatahama.
Latitude
33.4425°
Longitude
132.3815°

References & Identifiers

Nearest Port
Kawanazu(1.3 km)
Admiralty No.
M5623.4
NGA No.
10376

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round cylindrical concrete tower

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Zeku Iwa Lighthouse at night?+
Zeku Iwa displays the characteristic Mo Red 8s. 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 Zeku Iwa Lighthouse guide vessels into?+
Zeku Iwa Lighthouse assists vessels approaching 5 nearby ports. The closest is Kawanoishi at 1.8 NM to the NNE. Other ports served include Mikame (1.8 NM ENE), Yawatahama (1.9 NM ENE), Ikata (2.8 NM NNW), MITSUKE (6.7 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Zeku Iwa Lighthouse still active and maintained?+
Yes, Zeku Iwa 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 Zeku Iwa Lighthouse?+
Zeku Iwa 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 Zeku Iwa Lighthouse?+
You can track vessels near Zeku Iwa 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.