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Onasohana Lighthouse

Fl (2) W 6s🇯🇵Honshu-South Coast, JPOperational

Location & Light Range

About Onasohana Lighthouse

Onasohana Lighthouse operates on Honshu's South Coast. Its focal plane reaches 60 meters above sea level. The light emits two white flashes, repeating each 6-second cycle. This characteristic provides a distinct signal for mariners.

Why it matters: The light's 7 nautical mile geographic range offers a significant navigational reference in the area.

Light & Optic

Characteristic Signature
Fl (2) W 6s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
6s
Raw Code
Fl.(2)W. period 6s
Focal Height
60m
Light Range
7NM (13.0 km)
Geographic Range
7NM

References & Identifiers

Admiralty No.
M6012
NGA No.
6580

Location

City
Honshu-South Coast
Country
🇯🇵JP
Latitude
34.0819°
Longitude
136.2678°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Onasohana Lighthouse be seen?+
With a focal height of 60 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Onasohana 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 Onasohana Lighthouse at night?+
Onasohana displays the characteristic Fl (2) W 6s — 2 white flashes 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 Onasohana Lighthouse guide vessels into?+
Onasohana Lighthouse assists vessels approaching 5 nearby ports. The closest is Hikimoto at 2.2 NM to the NW. Other ports served include Owase (2.9 NM WSW), Nagashima (8.2 NM NNE), Nigishima (9.3 NM SSW), Nishiki (10.1 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Onasohana Lighthouse still active and maintained?+
Yes, Onasohana 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 Onasohana Lighthouse?+
Onasohana 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 Onasohana Lighthouse?+
You can track vessels near Onasohana 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.