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Yakumo Town Lighthouses Lighthouse

Oc Green 8s🇯🇵Yakumo, JPOperational

Location & Light Range

About Yakumo Town Lighthouses Lighthouse

A white, cylindrical concrete tower 11 meters in height is situated at the extremity of the northern breakwater that safeguards Ainuma harbor. This lighthouse provides an occulting green light, characterized by a single flash every 8 seconds, which can be seen up to 12.2 nautical miles away. The light source is positioned 16 meters above sea level. The building comprises a lantern room and a surrounding gallery. Public access is permitted to the grounds, but the tower itself is not open. Motomachi, the closest port, is located about 7 kilometers distant.

Why it matters: This lighthouse functions as a navigation aid for vessels entering and leaving Ainuma harbor, indicating the end of the primary breakwater. Public access to the location allows for greater appreciation of maritime safety markers and local landmarks.

Light & Optic

Characteristic Signature
Oc Green 8s
Flash Type
Occulting
Light Color
Green
Interval
8s
Raw Code
Oc G 8s
Focal Height
16m
Geographic Range
12.2NM

Location

City
Yakumo
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
Located at the end of the north (main) breakwater protecting Ainuma harbor in Kumaishi.
Latitude
42.0741°
Longitude
140.0619°

References & Identifiers

Nearest Port
Motomachi(7.0 km)
ARLHS No.
JPN-841

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
white
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 Yakumo Town Lighthouses Lighthouse at night?+
Yakumo Town Lighthouses displays the characteristic Oc Green 8s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Yakumo Town Lighthouses Lighthouse guide vessels into?+
Yakumo Town Lighthouses Lighthouse assists vessels approaching 5 nearby ports. The closest is Motomachi at 6.9 NM to the SSE. Other ports served include Esashi/Hiyama (12.7 NM SSE), Moriage (23.4 NM E), Morinohama (23.4 NM E), Ogomori (23.4 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yakumo Town Lighthouses Lighthouse still active and maintained?+
Yes, Yakumo Town Lighthouses 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.
How can I track vessels near Yakumo Town Lighthouses Lighthouse?+
You can track vessels near Yakumo Town Lighthouses 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.