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Izu-osesaki Lighthouse

Fl (3) W 13s🇯🇵Honshu-South Coast, JPOperational

Location & Light Range

About Izu-osesaki Lighthouse

This lighthouse features a white tower standing 39 meters tall. It is situated on the Honshu South Coast. The light emits three white flashes, repeating every 13 seconds. Its focal height reaches 16 meters above sea level. The geographic range of the light extends for 7 nautical miles.

Light & Optic

Characteristic Signature
Fl (3) W 13s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
13s
Raw Code
Fl.(3)W. period 13s
Focal Height
16m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Honshu-South Coast
Country
🇯🇵JP
Latitude
35.0307°
Longitude
138.7877°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
39m
Tower Color
white

Structure: White tower; 39

References & Identifiers

Admiralty No.
M6267.7
NGA No.
5664
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Frequently Asked Questions

How far offshore can Izu-osesaki Lighthouse be seen?+
With a focal height of 16 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Izu-osesaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Izu-osesaki Lighthouse at night?+
Izu-osesaki displays the characteristic Fl (3) W 13s — 3 white flashes every 13 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 Izu-osesaki Lighthouse guide vessels into?+
Izu-osesaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Heda at 3.5 NM to the SSW. Other ports served include Numazu (4.5 NM NE), Omosu (4.9 NM E), Toi (7.1 NM S), Agonoura (7.5 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Izu-osesaki Lighthouse still active and maintained?+
Yes, Izu-osesaki 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 Izu-osesaki Lighthouse?+
Izu-osesaki 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 Izu-osesaki Lighthouse?+
You can track vessels near Izu-osesaki 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.