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Ohirase Lighthouse

Iso W 6s🇯🇵Honshu-Northwest Coast, JPOperational

Location & Light Range

About Ohirase Lighthouse

This lighthouse emits an isophase white light, repeating its cycle every 6 seconds. Its focal height reaches 141 meters above sea level. The operational light has a geographic range of 5 nautical miles. It is situated on the Honshu-Northwest Coast.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
141m
Light Range
5NM (9.3 km)
Geographic Range
5NM

References & Identifiers

Admiralty No.
M7360.6
NGA No.
1736

Location

City
Honshu-Northwest Coast
Country
🇯🇵JP
Latitude
34.5251°
Longitude
131.4561°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Ohirase Lighthouse be seen?+
With a focal height of 141 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Ohirase 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 Ohirase Lighthouse at night?+
Ohirase displays the characteristic Iso W 6s — 1 white flash every 6 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 Ohirase Lighthouse guide vessels into?+
Ohirase Lighthouse assists vessels approaching 5 nearby ports. The closest is Hagi at 5.8 NM to the SSW. Other ports served include Susa (9 NM NE), Esaki (11.7 NM NE), Senzaki (14.7 NM SW), Fukawa (16 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ohirase Lighthouse still active and maintained?+
Yes, Ohirase 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 Ohirase Lighthouse?+
Ohirase 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 Ohirase Lighthouse?+
You can track vessels near Ohirase 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.