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Aguni Shima Lighthouse

Oc White 4s🇯🇵Aguni, JPOperational

Location & Light Range

About Aguni Shima Lighthouse

Aguni Shima Lighthouse, built in 1978, is a 16-meter-high, cylindrical concrete tower. This structure, featuring a gallery and an attached single-story concrete equipment building, is situated on the southwestern end of Aguni Shima. Its light has a focal height of 108 meters and emits a white flash every 4 seconds (Oc W 4s), visible for 25.7 nautical miles. The site is accessible to visitors, but the tower is not open. The lighthouse was repainted in 2023.

Why it matters: This light marks the island's southwestern point, serving as a reference for craft in the surrounding waters. It aids local fishing vessels and the ferries that connect the island with the mainland.

Light & Optic

Characteristic Signature
Oc White 4s
Flash Type
Occulting
Light Color
White
Interval
4s
Raw Code
Oc W 4s
Focal Height
108m
Geographic Range
25.7NM

Construction & History

Year Built
1978

Significant events: Repainted in 2023

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
16m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with gallery, attached to a 1-story concrete equipment building

Location

City
Aguni
Country
🇯🇵Japan
Region
Okinawa Prefecture
Sea Region
Aguni Shima, a small island about 50 km west northwest of Zanpa Saki, Okinawa, located at the southwestern tip of the island.
Latitude
26.5779°
Longitude
127.2119°

References & Identifiers

Nearest Port
Aguni(1.2 km)
Admiralty No.
M4739.48
ARLHS No.
JPN-004
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Frequently Asked Questions

How do mariners identify Aguni Shima Lighthouse at night?+
Aguni Shima displays the characteristic Oc White 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Aguni Shima Lighthouse guide vessels into?+
Aguni Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Zamami at 21.7 NM to the SSE. Other ports served include Tokashiki (24.3 NM SSE), Kanegusuku (28.5 NM WSW), Naha, Okinawa (32.3 NM SE), Ginowan (33.4 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Aguni Shima Lighthouse still active and maintained?+
Yes, Aguni Shima 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 Aguni Shima Lighthouse?+
You can track vessels near Aguni Shima 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.