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Izu Ose Saki Lighthouse

Fl (3) White 13s🇯🇵Numazu, JPOperational

Location & Light Range

About Izu Ose Saki Lighthouse

Also known as: Izu Ose Saki (Osezaki)

Built in 1957, the Izu Ose Saki Lighthouse is a 13-meter tall, cylindrical concrete tower painted white, set upon a circular, single-story concrete foundation. Its light characteristic is a white flash every 13 seconds (Fl W 13s), with the light source positioned 16 meters above sea level. This provides a visibility range of 12.2 nautical miles. The structure is located on a cape near Numazu city, within Shizuoka Prefecture, Japan. The port of Heda is 3.4 kilometers distant.

Why it matters: The lighthouse marks a cape on the northwestern Izu Peninsula, aiding vessels in this area with complex coastal features.

Light & Optic

Characteristic Signature
Fl (3) White 13s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
13s
Raw Code
Fl W 13s
Focal Height
16m
Geographic Range
12.2NM

Construction & History

Year Built
1957

References & Identifiers

Nearest Port
Heda(3.4 km)
Admiralty No.
M6267.7
ARLHS No.
JPN-200

Tower & Structure

Tower Height
13m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower mounted on a round 1-story concrete base

Location

City
Numazu
Country
🇯🇵Japan
Region
Shizuoka Prefecture
Sea Region
Located on a cape at the northwestern corner of the Izu Peninsula.
Latitude
35.0304°
Longitude
138.7881°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Izu Ose Saki Lighthouse at night?+
Izu Ose Saki displays the characteristic Fl (3) White 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. The white color may indicate a specific sector or warning zone.
Which ports and harbors does Izu Ose Saki Lighthouse guide vessels into?+
Izu Ose Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Heda at 3.4 NM to the SSW. Other ports served include Numazu (4.5 NM NE), Omosu (4.9 NM E), Toi (7 NM S), Agonoura (7.5 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Izu Ose Saki Lighthouse still active and maintained?+
Yes, Izu Ose Saki 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 Ose Saki Lighthouse?+
Izu Ose Saki 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 Ose Saki Lighthouse?+
You can track vessels near Izu Ose Saki 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.