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Akaiwa Saki Lighthouse

Fl (2) White 7s🇯🇵Haboro, JPOperational

Location & Light Range

About Akaiwa Saki Lighthouse

Akaiwa Saki Lighthouse, built of concrete in 1952, stands 9.5 meters tall as a cylindrical white tower attached to an equipment shelter. Located overlooking the Sea of Japan at the southwestern tip of Teuri Tō island, its light is visible for 28.5 nautical miles. The lighthouse emits a white flash every seven seconds. The site is open to the public, offering access to an observation platform with views of the surrounding cliffs and sea, though the tower itself is closed to visitors. It lies 2.1 kilometers from the nearest port, Teuri.

Why it matters: This lighthouse marks the southwestern tip of Teuri Tō, guiding vessels navigating the Sea of Japan and helping to prevent groundings on the island's coastline.

Light & Optic

Characteristic Signature
Fl (2) White 7s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
7s
Raw Code
Fl W 7s
Focal Height
137m
Geographic Range
28.5NM

Construction & History

Year Built
1952

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower attached to a small equipment shelter

Location

City
Haboro
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
overlooking the Sea of Japan at the southwestern tip of Teuri Tō
Latitude
44.4146°
Longitude
141.2943°

References & Identifiers

Nearest Port
Teuri(2.1 km)
Admiralty No.
M6941
NGA No.
1332
ARLHS No.
JPN-843
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Frequently Asked Questions

How do mariners identify Akaiwa Saki Lighthouse at night?+
Akaiwa Saki displays the characteristic Fl (2) White 7s — 2 white flashes every 7 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. The white color may indicate a specific sector or warning zone.
Which ports and harbors does Akaiwa Saki Lighthouse guide vessels into?+
Akaiwa Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Teuri at 2.1 NM to the NE. Other ports served include Nishiura (4.8 NM ENE), Yagishiri (6 NM ENE), Tomamae (16.5 NM ESE), Haboro (17.7 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Akaiwa Saki Lighthouse still active and maintained?+
Yes, Akaiwa Saki 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 Akaiwa Saki Lighthouse?+
You can track vessels near Akaiwa Saki 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.