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

Shirasaki Lighthouse

Fl W 4s🇯🇵Shikoku-South coast, JPOperational

Location & Light Range

About Shirasaki Lighthouse

The Shirasaki Lighthouse features a red, cylindrical concrete tower that stands 23 meters high. Its white light flashes once every 4 seconds. The focal height of the light reaches 56 meters above sea level. This structure marks the Shikoku-South coast.

Why it matters: Its light has a geographic range of 12 nautical miles, serving as a guide for vessels in the area.

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
56m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Location

City
Shikoku-South coast
Country
🇯🇵JP
Latitude
32.8535°
Longitude
132.6570°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
23m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: Red cylindrical mast; 23

References & Identifiers

Admiralty No.
M5610.2
NGA No.
10520
Live tracking · 50,000+ mariners

Find Shirasaki Lighthouse on the live nautical map

Plan voyages near JP, 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 far offshore can Shirasaki Lighthouse be seen?+
With a focal height of 56 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Shirasaki 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 Shirasaki Lighthouse at night?+
Shirasaki 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 Shirasaki Lighthouse guide vessels into?+
Shirasaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Ozuku at 3.5 NM to the ENE. Other ports served include Kozukushi (3.6 NM ENE), Ikeshima (4.3 NM NNE), Issai (4.3 NM S), Sukumowan (4.8 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Shirasaki Lighthouse still active and maintained?+
Yes, Shirasaki 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 Shirasaki Lighthouse?+
Shirasaki 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 Shirasaki Lighthouse?+
You can track vessels near Shirasaki 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.