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Dentarohana Lighthouse

Fl W 4s🇯🇵Seto Naikai Western, JPOperational

Location & Light Range

About Dentarohana Lighthouse

This lighthouse is situated in Seto Naikai Western. Its focal height reaches 17 meters above sea level. The light emits a single white flash every 4 seconds. This station is operational and provides a geographic range of 7 nautical miles.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 4s
Focal Height
17m
Light Range
7NM (13.0 km)
Geographic Range
7NM

References & Identifiers

Admiralty No.
M5664.4
NGA No.
9092

Location

City
Seto Naikai Western
Country
🇯🇵JP
Latitude
34.1081°
Longitude
132.4472°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Dentarohana Lighthouse be seen?+
With a focal height of 17 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Dentarohana 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 Dentarohana Lighthouse at night?+
Dentarohana displays the characteristic Fl W 4s — 1 white flash every 4 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.
Which ports and harbors does Dentarohana Lighthouse guide vessels into?+
Dentarohana Lighthouse assists vessels approaching 5 nearby ports. The closest is Ryohshida at 3.4 NM to the NE. Other ports served include Kanokawa (4.9 NM N), Tainouchi (4.9 NM E), Okunouchi (5 NM NE), Mitsukoshima (5.7 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Dentarohana Lighthouse still active and maintained?+
Yes, Dentarohana 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 Dentarohana Lighthouse?+
Dentarohana 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 Dentarohana Lighthouse?+
You can track vessels near Dentarohana 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.