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Iwai Saki Lighthouse

Occ (3) WR 13s🇯🇵Northeastern Honshū, JPOperational

Location & Light Range

About Iwai Saki Lighthouse

The Iwai Saki lighthouse stands on Northeastern Honshū. It has a focal height of 24 meters above sea level. The light emits an isophase white signal, repeating a 6-second cycle. This navigational aid is operational and marks its location with a focused beam.

Why it matters: This lighthouse provides a geographic range of 12 nautical miles.

Light & Optic

Characteristic Signature
Occ (3) WR 13s
Flash Type
Occ
Light Color
WR
Flash Count
3 flashes
Interval
13s
Raw Code
Iso.W. period 6s
Focal Height
24m
Light Range
13NM (24.1 km)
Geographic Range
12NM

References & Identifiers

Admiralty No.
M6564
NGA No.
4276

Location

City
Northeastern Honshū
Country
🇯🇵JP
Latitude
38.8284°
Longitude
141.6034°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Iwai Saki Lighthouse be seen?+
With a focal height of 24 meters and a nominal range of 13 nautical miles (approximately 24.1 km), Iwai Saki 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 Iwai Saki Lighthouse at night?+
Iwai Saki displays the characteristic Occ (3) WR 13s — 3 wr 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 wr color may indicate a specific sector or warning zone.
Which ports and harbors does Iwai Saki Lighthouse guide vessels into?+
Iwai Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is En at 2.3 NM to the N. Other ports served include Nakayama (2.3 NM N), Obatake (2.3 NM N), Saba (2.3 NM N), Kesennuma (4.2 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Iwai Saki Lighthouse still active and maintained?+
Yes, Iwai 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 Iwai Saki Lighthouse?+
Iwai 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 Iwai Saki Lighthouse?+
You can track vessels near Iwai 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.