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Nagaoka Lighthouse

Iso W 6s🇯🇵Shimane, JPOperational

Location & Light Range

About Nagaoka Lighthouse

Nagaoka Lighthouse is a quadrilateral latticed tower constructed of fiberglass. The structure stands 37 meters tall and is painted with white and red bands. It displays a red and white square daymark. The focal height of the light is 76 meters. The lighthouse emits a white flash every 3 seconds and has a geographic range of 12 nautical miles. A horn is fitted to the structure, pointing 254 degrees.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Fl.W. period 3s
Focal Height
76m
Geographic Range
12NM

Location

City
Shimane
Country
🇯🇵JP
Latitude
35.5036°
Longitude
132.8323°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
37m
Tower Shape
square
Tower Color
white and red
Material
fiberglass

Structure: Quadrilateral latticed tower, red and white square daymark; 37. Horn points 254°

References & Identifiers

Admiralty No.
M7331
NGA No.
1960
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Frequently Asked Questions

How do mariners identify Nagaoka Lighthouse at night?+
Nagaoka displays the characteristic Iso W 6s — 1 white flash every 6 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 Nagaoka Lighthouse guide vessels into?+
Nagaoka Lighthouse assists vessels approaching 5 nearby ports. The closest is Kawashimo at 4.9 NM to the SW. Other ports served include Aikakita (5.1 NM E), Etomo (7 NM E), Sagi (8 NM WSW), Taisha (10.2 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Nagaoka Lighthouse still active and maintained?+
Yes, Nagaoka 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 Nagaoka Lighthouse?+
Nagaoka 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 Nagaoka Lighthouse?+
You can track vessels near Nagaoka 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.