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Kasa Iso Lighthouse

Fl (2) White 5s🇯🇵Etajima, JPOperational

Location & Light Range

About Kasa Iso Lighthouse

Constructed in 1981, Kasa Iso is a concrete lighthouse located about 500 meters off the northern end of Eta Shima island. The structure consists of a concrete post that supports a large round platform. It is painted black with a red horizontal band for enhanced visibility. The tower stands 7.5 meters tall, with its light positioned 10 meters above sea level. Kasa Iso emits a white light that flashes once every 5 seconds. The site is accessible to visitors, though the tower itself is closed to the public.

Why it matters: This light is essential for guiding vessels navigating the waters around the northern end of Eta Shima, a significant point for local maritime traffic.

Light & Optic

Characteristic Signature
Fl (2) White 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl W 5s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1981

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7.5m
Tower Shape
cylindrical
Tower Color
black with a red horizontal band
Material
concrete

Structure: concrete post supporting a large round platform structure

Location

City
Etajima
Country
🇯🇵Japan
Region
Hiroshima Prefecture
Sea Region
500 m (0.3 mi) off the north end of Eta Shima
Latitude
34.2982°
Longitude
132.4791°

References & Identifiers

Nearest Port
Koyoh(4.6 km)
Admiralty No.
M5680.9
NGA No.
8976
USCG No.
JCG-4740
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Frequently Asked Questions

How do mariners identify Kasa Iso Lighthouse at night?+
Kasa Iso displays the characteristic Fl (2) White 5s — 2 white flashes every 5 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Kasa Iso Lighthouse guide vessels into?+
Kasa Iso Lighthouse assists vessels approaching 5 nearby ports. The closest is Etajima at 3.1 NM to the SSE. Other ports served include Chitose, Hiroshima (3.2 NM N), Fukae, Hiroshima (3.2 NM N), Kawajiri, Hiroshima (3.2 NM N), Nakahama, Hiroshima (3.2 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kasa Iso Lighthouse still active and maintained?+
Yes, Kasa Iso 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 Kasa Iso Lighthouse?+
Kasa Iso 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 Kasa Iso Lighthouse?+
You can track vessels near Kasa Iso 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.