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Imai Saki Lighthouse

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

Location & Light Range

About Imai Saki Lighthouse

A round cylindrical concrete tower, painted white, was constructed and first illuminated in 1975. Reaching a height of 10 meters, with a focal plane 63 meters above the sea, it offers a geographic range of 20.5 nautical miles. Its light characteristic is a white flash every seven seconds (Fl W 7s). The structure is located on the western side of Kasari Bay, north of Amami Ōshima. The grounds are accessible, but the tower is not open to the public.

Why it matters: This navigation aid marks the entrance to Kasari Bay, a harbor near Tatsugo. It warns ships away from the point and aids entry into the protected waters.

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
63m
Geographic Range
20.5NM

Construction & History

Year Built
1975

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with gallery

Location

City
Tatsugo
Country
🇯🇵Japan
Region
Kagoshima Prefecture
Sea Region
marks the entrance to Kasari Bay, a sheltered harbor on the north coast of Amami Ōshima. Located on a promontory at the west side of the bay entrance, about 16 km northeast of Naze.
Latitude
28.4763°
Longitude
129.6212°

References & Identifiers

Nearest Port
En(1.9 km)
ARLHS No.
JPN-163
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Frequently Asked Questions

How do mariners identify Imai Saki Lighthouse at night?+
Imai 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 Imai Saki Lighthouse guide vessels into?+
Imai Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Tatsugo at 1.1 NM to the SSW. Other ports served include Yani (2.4 NM NE), Akakina (2.8 NM ESE), Ashitoku (3.3 NM S), Toguchi (7.1 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Imai Saki Lighthouse still active and maintained?+
Yes, Imai 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 Imai Saki Lighthouse?+
You can track vessels near Imai 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.