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Yunosiri Kō Lighthouse

F Red 4s🇯🇵Oga, JPOperational

Location & Light Range

About Yunosiri Kō Lighthouse

Yunosiri Kō is a red, cylindrical concrete tower located at the end of the west breakwater in Yunosiri. Standing 11 meters tall with a focal height of 12 meters, it emits a flashing red light every four seconds. The lighthouse offers a geographic range of 11 nautical miles. The site is open to the public, but the tower itself is closed. It is situated approximately 7 kilometers southeast of Nyūdō Saki.

Why it matters: This lighthouse guides vessels into Yunosiri harbor, providing a clear signal for safe passage along the west breakwater, particularly for local fishing boats.

Light & Optic

Characteristic Signature
F Red 4s
Flash Type
Fixed
Light Color
Red
Interval
4s
Raw Code
F.Fl R 4s
Focal Height
12m
Geographic Range
11NM

Location

City
Oga
Country
🇯🇵Japan
Region
Akita Prefecture
Sea Region
Located at the end of the west breakwater at Yunosiri, about 7 km southeast of Nyūdō Saki.
Latitude
39.9765°
Longitude
139.7509°

References & Identifiers

Nearest Port
Kitaura, Akita(2.0 km)
Admiralty No.
M7057.4
NGA No.
3608
ARLHS No.
JPN-1049

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Yunosiri Kō Lighthouse at night?+
Yunosiri Kō displays the characteristic F Red 4s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Yunosiri Kō Lighthouse guide vessels into?+
Yunosiri Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Funagawa at 7.2 NM to the SE. Other ports served include Akitafunagawa (7.7 NM SE), Funakawa (8.3 NM SE), Noshiro (17.9 NM NE), Akita (19.2 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yunosiri Kō Lighthouse still active and maintained?+
Yes, Yunosiri Kō 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 Yunosiri Kō Lighthouse?+
Yunosiri Kō 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 Yunosiri Kō Lighthouse?+
You can track vessels near Yunosiri Kō 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.