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Biwasaki Lighthouse

Fl W 3s🇯🇵Seto Naikai Western, JPOperational

Location & Light Range

About Biwasaki Lighthouse

Biwasaki Lighthouse is a white, round concrete tower 23 meters in height. Its light characteristic is a single white flash occurring every 3 seconds. The established sector of visibility extends from 070 degrees to 054 degrees. Between 054 and 070 degrees, the light's visibility is partially obscured by the wreck known as 'Wongala'. The lighthouse is situated in the Seto Naikai Western region.

Why it matters: This lighthouse has a geographic range of 7 nautical miles.

Light & Optic

Characteristic Signature
Fl W 3s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
3s
Raw Code
Fl.W. period 3s
Focal Height
50m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Seto Naikai Western
Country
🇯🇵JP
Latitude
33.6863°
Longitude
131.5610°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
23m
Tower Shape
round
Tower Color
white
Material
concrete

Structure: White lattice tower; 23. Visible 070°-054°, Partially obscured 054°-070° by the wreck "Wongala"

References & Identifiers

Admiralty No.
M4971
NGA No.
9696
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Frequently Asked Questions

How far offshore can Biwasaki Lighthouse be seen?+
With a focal height of 50 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Biwasaki 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 Biwasaki Lighthouse at night?+
Biwasaki displays the characteristic Fl W 3s — 1 white flash every 3 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 Biwasaki Lighthouse guide vessels into?+
Biwasaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Imi at 1.9 NM to the E. Other ports served include Himeshima (4.8 NM ENE), Kumage (4.8 NM ESE), Togi (9.2 NM ESE), Kunisaki (11.6 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Biwasaki Lighthouse still active and maintained?+
Yes, Biwasaki 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 Biwasaki Lighthouse?+
Biwasaki 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 Biwasaki Lighthouse?+
You can track vessels near Biwasaki 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.