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Aonae Kō Lighthouse

Fl (2) Green 6s🇯🇵Okushiri, JPOperational

Location & Light Range

About Aonae Kō Lighthouse

The Aonae Kō lighthouse was constructed in 1974 as a cylindrical concrete tower, 11 meters in height, painted red. Its design featured a round hourglass shape topped with a lantern and gallery. This structure originally marked the end of the main breakwater for Aonae harbor. For forty years, it emitted a green light, showing a single flash every six seconds. In 2014, the lighthouse was deactivated and later demolished.

Why it matters: The lighthouse guided vessels into Aonae harbor and its hourglass-shaped tower served as a distinct visual reference for mariners. Its demolition reflects the modernization of maritime infrastructure.

Light & Optic

Characteristic Signature
Fl (2) Green 6s
Flash Type
Flashing
Light Color
Green
Flash Count
2 flashes
Interval
6s
Raw Code
Fl G 6s

Construction & History

Year Built
1974

Significant events: Deactivated and demolished in 2014, light moved to a mast on the new South Breakwater

References & Identifiers

Nearest Port
Aonae(0.1 km)
Admiralty No.
M7023
USCG No.
JCG-0612
ARLHS No.
JPN-845

Tower & Structure

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

Structure: round hourglass-shaped concrete tower with lantern and gallery, painted red

Location

City
Okushiri
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
The harbor at Aonae, formerly at the end of the original main breakwater, now an inner breakwater
Latitude
42.0584°
Longitude
139.4529°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Aonae Kō Lighthouse at night?+
Aonae Kō displays the characteristic Fl (2) Green 6s — 2 green flashes every 6 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Aonae Kō Lighthouse guide vessels into?+
Aonae Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Aonae at 0.1 NM to the NNE. Other ports served include Okushiri (7.8 NM NNE), Setana (29.2 NM NE), Motomachi (30.8 NM E), Esashi/Hiyama (32 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Aonae Kō Lighthouse still active and maintained?+
Yes, Aonae 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.
How can I track vessels near Aonae Kō Lighthouse?+
You can track vessels near Aonae 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.