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Siso Shima Lighthouse

Fl W 5s🇯🇵Wakayama Prefecture, JPOperational

Location & Light Range

About Siso Shima Lighthouse

This grey, square latticed tower stands 22 meters tall. Its focal height reaches 14 meters above sea level. The lighthouse emits a white light, producing a single flash every 4 seconds. It has a geographic range of 5 nautical miles. The structure is a private navigational aid.

Light & Optic

Characteristic Signature
Fl W 5s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
5s
Raw Code
Fl.W. period 4s
Focal Height
14m
Geographic Range
5NM

Location

City
Wakayama Prefecture
Country
🇯🇵JP
Latitude
33.6927°
Longitude
135.3264°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
22m
Tower Shape
square
Tower Color
grey

Structure: Square latticed tower; 22. Private

References & Identifiers

Admiralty No.
M5979
NGA No.
6828
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Frequently Asked Questions

How do mariners identify Siso Shima Lighthouse at night?+
Siso Shima displays the characteristic Fl W 5s — 1 white 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.
Which ports and harbors does Siso Shima Lighthouse guide vessels into?+
Siso Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Tanabe at 3 NM to the NE. Other ports served include Mori (3.5 NM ENE), Inami (9 NM NW), SHIMOJI (12 NM SE), Hidaka (13.9 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Siso Shima Lighthouse still active and maintained?+
Yes, Siso Shima 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 Siso Shima Lighthouse?+
Siso Shima 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 Siso Shima Lighthouse?+
You can track vessels near Siso Shima 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.