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Kusatsu Lighthouse

Fl R 5s🇯🇵Okayama and Hiroshima, JPOperational

Location & Light Range

About Kusatsu Lighthouse

This lighthouse is operational and emits a single red flash every 5 seconds. Its focal height reaches 12 meters above sea level. The light provides a geographic range of 7 nautical miles. The lighthouse is situated between the cities of Okayama and Hiroshima.

Light & Optic

Characteristic Signature
Fl R 5s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
5s
Raw Code
Fl.R. period 5s
Focal Height
12m
Geographic Range
7NM

References & Identifiers

Admiralty No.
M5684
NGA No.
9024

Location

City
Okayama and Hiroshima
Country
🇯🇵JP
Latitude
34.3601°
Longitude
132.4023°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Kusatsu Lighthouse at night?+
Kusatsu displays the characteristic Fl R 5s — 1 red flash 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Kusatsu Lighthouse guide vessels into?+
Kusatsu Lighthouse assists vessels approaching 5 nearby ports. The closest is Hiroshima at 1.1 NM to the SE. Other ports served include Chitose, Hiroshima (3.2 NM E), Fukae, Hiroshima (3.2 NM E), Kawajiri, Hiroshima (3.2 NM E), Nakahama, Hiroshima (3.2 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kusatsu Lighthouse still active and maintained?+
Yes, Kusatsu 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 Kusatsu Lighthouse?+
Kusatsu 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 Kusatsu Lighthouse?+
You can track vessels near Kusatsu 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.