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Konoishi Lighthouse

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

Location & Light Range

About Konoishi Lighthouse

Also known as: Konoishi (Kono Isi)

Konoishi lighthouse is a cylindrical concrete tower standing 12 meters tall, painted black with a single red horizontal band. It is mounted on a concrete pier as part of a structure with two galleries. The lighthouse stands on a submerged reef located about 5 km southeast of Tomo harbor. Its operational life has included an increase in height through the addition of an upper stage. Konoishi emits a white light with two flashes every 5 seconds, visible for 11.6 nautical miles. The tower itself is not open to the public.

Why it matters: This lighthouse marks a dangerous reef situated close to a major shipping channel, directly aiding maritime safety in the waters near Fukuyama.

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
14m
Geographic Range
11.6NM

Construction & History

Significant events: height increased by adding upper stage

References & Identifiers

Nearest Port
Fukuyama, Hiroshima(5.0 km)
Admiralty No.
M5730
NGA No.
8392

Tower & Structure

Tower Height
12m
Tower Shape
cylindrical
Tower Color
black with one red horizontal band
Material
concrete

Structure: round concrete tower with two galleries, mounted on a concrete pier

Location

City
Fukuyama
Country
🇯🇵Japan
Region
Hiroshima Prefecture
Sea Region
A dangerous reef close to a major shipping channel, located about 5 km southeast of Tomo harbor.
Latitude
34.3657°
Longitude
133.4265°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Konoishi Lighthouse at night?+
Konoishi 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 Konoishi Lighthouse guide vessels into?+
Konoishi Lighthouse assists vessels approaching 5 nearby ports. The closest is Fukuyama, Kagoshima at 4.1 NM to the N. Other ports served include Kuyama (4.1 NM N), Fukuyama, Hiroshima (5.3 NM N), Tsuneishi (6.6 NM WNW), Yokota, Hiroshima (6.8 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Konoishi Lighthouse still active and maintained?+
Yes, Konoishi 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 Konoishi Lighthouse?+
Konoishi 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 Konoishi Lighthouse?+
You can track vessels near Konoishi 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.