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Izu-oshima Lighthouse

Fl (3) W 30s🇯🇵Nanpo-Shoto, JPOperational

Location & Light Range

About Izu-oshima Lighthouse

This green, square lighthouse is constructed from stone. Its focal height reaches 103 meters above sea level, providing a geographic range of 19 nautical miles. The light displays three white flashes in a 30-second cycle. A green beacon tops the structure, which also features a green, point-up triangle daymark.

Light & Optic

Characteristic Signature
Fl (3) W 30s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
30s
Raw Code
Fl.(3)W. period 30s
Focal Height
103m
Light Range
19NM (35.2 km)
Geographic Range
19NM

Location

City
Nanpo-Shoto
Country
🇯🇵JP
Latitude
34.7976°
Longitude
139.3722°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
square
Tower Color
green
Material
stone

Structure: STARBOARD (IALA A) Green beacon, green topmark, green triangle, point up daymark

References & Identifiers

Admiralty No.
M6282
NGA No.
5476
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Frequently Asked Questions

How far offshore can Izu-oshima Lighthouse be seen?+
With a focal height of 103 meters and a nominal range of 19 nautical miles (approximately 35.2 km), Izu-oshima 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 Izu-oshima Lighthouse at night?+
Izu-oshima displays the characteristic Fl (3) W 30s — 3 white flashes every 30 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-oshima Lighthouse guide vessels into?+
Izu-oshima Lighthouse assists vessels approaching 5 nearby ports. The closest is Okada at 0.8 NM to the ESE. Other ports served include Nishitokyo (8.8 NM ESE), Inatori (16.2 NM W), Itoh, Shizuoka (17.1 NM NW), Toshima/Tokyo (17.7 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Izu-oshima Lighthouse still active and maintained?+
Yes, Izu-oshima 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-oshima Lighthouse?+
Izu-oshima 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-oshima Lighthouse?+
You can track vessels near Izu-oshima 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.