Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Satuma Se Lighthouse

Fl (2) White 5s🇯🇵Kamiamakusa, JPOperational

Location & Light Range

About Satuma Se Lighthouse

This lighthouse stands as a round concrete tower, 9 meters high, atop a stone pier. It is painted black with a single red horizontal band. The structure's focal height reaches 10 meters, casting a white light that flashes once every 5 seconds. This light has a geographic range of 10.4 nautical miles. Located on an isolated reef approximately 1.5 km east of Yanagi, Japan, it is accessible only by boat. The site is open to visitors, though the tower itself remains closed.

Why it matters: The lighthouse marks a reef that becomes submerged at high tide, posing a significant hazard to navigation near Kamiamakusa.

Light & Optic

Characteristic Signature
Fl (2) White 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl W 5s
Focal Height
10m
Geographic Range
10.4NM

Location

City
Kamiamakusa
Country
🇯🇵Japan
Region
Kumamoto Prefecture
Sea Region
An isolated reef, hidden at high tide, approximately 1.5 km east of Yanagi, Japan.
Latitude
32.5459°
Longitude
130.4554°

References & Identifiers

Nearest Port
Yanagi(0.7 km)
Admiralty No.
M5141.4
NGA No.
11516

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
black with one red horizontal band
Material
stone, concrete

Structure: round concrete tower mounted on a round stone pier

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
Live tracking · 50,000+ mariners

Find Satuma Se Lighthouse on the live nautical map

Plan voyages near Japan, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Satuma Se Lighthouse at night?+
Satuma Se displays the characteristic Fl (2) White 5s — 2 white flashes 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Satuma Se Lighthouse guide vessels into?+
Satuma Se Lighthouse assists vessels approaching 5 nearby ports. The closest is Yanagi at 0.7 NM to the WNW. Other ports served include Amura (1.3 NM S), Aizu, Kumamoto (3.3 NM N), Akasaki, Kumamoto (3.3 NM N), Fukuura, Kumamoto (3.3 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Satuma Se Lighthouse still active and maintained?+
Yes, Satuma Se 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 Satuma Se Lighthouse?+
Satuma Se 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 Satuma Se Lighthouse?+
You can track vessels near Satuma Se 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.