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Irisaki Lighthouse

Fl W 5s🇯🇵Nansei Shoto, JPInactive

Location & Light Range

About Irisaki Lighthouse

Constructed and first illuminated in 1957, the Irisaki lighthouse stands at a focal height of 75 meters. It produces a single white flash every 5 seconds. The geographic range of its light extended to 22 nautical miles. This station is no longer operational.

Light & Optic

Characteristic Signature
Fl W 5s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
5s
Raw Code
Fl.W. period 5s
Focal Height
75m
Light Range
22NM (40.7 km)
Geographic Range
22NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
24.4500°
Longitude
122.9342°

Nearby Vessels

Flag
Type
Name
Dist.

Construction & History

Year Built
1957

References & Identifiers

Admiralty No.
M4728
NGA No.
13580
Wikidata
Q11627508 →
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Frequently Asked Questions

How far offshore can Irisaki Lighthouse be seen?+
With a focal height of 75 meters and a nominal range of 22 nautical miles (approximately 40.7 km), Irisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Irisaki Lighthouse at night?+
Irisaki 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 Irisaki Lighthouse guide vessels into?+
Irisaki Lighthouse assists vessels approaching 3 nearby ports. The closest is Kubura at 0.4 NM to the ENE. Other ports served include Hatoma (45.5 NM E), Funaura (48.1 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Irisaki Lighthouse still active and maintained?+
Irisaki Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
How can I track vessels near Irisaki Lighthouse?+
You can track vessels near Irisaki 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.