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Satsuma-ioshima Lighthouse

Fl W 4s🇯🇵Nansei Shoto, JPOperational

Location & Light Range

About Satsuma-ioshima Lighthouse

The Satsuma-ioshima Lighthouse stands as a 36-meter masonry tower. Its exterior is painted white and features an orange diamond-shaped daymark. This structure guides vessels with a white light, characterized by a single flash occurring every 4 seconds. The lighthouse is situated on Nansei Shoto.

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
147m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
30.7829°
Longitude
130.2783°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
36m
Tower Color
white and orange
Material
masonry

Structure: White framework tower, orange diamond (rhombus) daymark; 36

References & Identifiers

Admiralty No.
M4787
NGA No.
12992
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Frequently Asked Questions

How far offshore can Satsuma-ioshima Lighthouse be seen?+
With a focal height of 147 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Satsuma-ioshima is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Satsuma-ioshima Lighthouse at night?+
Satsuma-ioshima 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 Satsuma-ioshima Lighthouse guide vessels into?+
Satsuma-ioshima Lighthouse assists vessels approaching 5 nearby ports. The closest is Takeshima at 7.6 NM to the ENE. Other ports served include Sato (16.8 NM W), Iwayadomari (18.8 NM SSW), Katadomari (19.3 NM W), Mugi (19.8 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Satsuma-ioshima Lighthouse still active and maintained?+
Yes, Satsuma-ioshima 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 Satsuma-ioshima Lighthouse?+
Satsuma-ioshima 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 Satsuma-ioshima Lighthouse?+
You can track vessels near Satsuma-ioshima 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.