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Katsuyama Ko Lighthouse

Fl R 5s🇯🇵Honshu-South Coast-Tokyo Wan, JPOperational

Location & Light Range

About Katsuyama Ko Lighthouse

This lighthouse stands 12 meters tall with a focal height of 12 meters. Its tower is painted red. The light emitted is a red isophase light, providing a flash characteristic on a cycle of 6 seconds. This light has a geographic range of 8 nautical miles. It is located on Honshu-South Coast-Tokyo Wan.

Light & Optic

Characteristic Signature
Fl R 5s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
5s
Raw Code
Iso
Focal Height
12m
Light Range
5NM (9.3 km)
Geographic Range
8NM

Location

City
Honshu-South Coast-Tokyo Wan
Country
🇯🇵JP
Latitude
35.1103°
Longitude
139.8256°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Color
red

References & Identifiers

Admiralty No.
M6445.5
NGA No.
5036
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Frequently Asked Questions

How far offshore can Katsuyama Ko Lighthouse be seen?+
With a focal height of 12 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Katsuyama Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Katsuyama Ko Lighthouse at night?+
Katsuyama Ko 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 Katsuyama Ko Lighthouse guide vessels into?+
Katsuyama Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Tateyama at 6.4 NM to the SSE. Other ports served include Muya (6.7 NM S), Kazusaminato (6.8 NM NNE), Maguchi (7.5 NM WNW), Kurihama (8.5 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Katsuyama Ko Lighthouse still active and maintained?+
Yes, Katsuyama Ko 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 Katsuyama Ko Lighthouse?+
Katsuyama Ko 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 Katsuyama Ko Lighthouse?+
You can track vessels near Katsuyama Ko 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.