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Ao Shima Lighthouse

Fl (2) W 7s🇯🇵Eastern Shikoku, JPOperational

Location & Light Range

About Ao Shima Lighthouse

This square concrete lighthouse was built in 2017. The structure stands 12 meters tall and has a focal height of 58 meters. Its light emits an isophase white flash every 2 seconds. The lighthouse is painted entirely white. This facility is located off the eastern coast of Shikoku, Japan, on a small island.

Light & Optic

Characteristic Signature
Fl (2) W 7s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
7s
Raw Code
Iso.R. period 2s
Focal Height
58m
Geographic Range
4NM

Construction & History

Year Built
2017

References & Identifiers

Admiralty No.
M5574
NGA No.
7068
ARLHS No.
JPN-022

Tower & Structure

Tower Shape
square
Material
concrete

Location

City
Eastern Shikoku
Country
🇯🇵JP
Latitude
33.9241°
Longitude
134.7200°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ao Shima Lighthouse at night?+
Ao Shima displays the characteristic Fl (2) W 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.
Which ports and harbors does Ao Shima Lighthouse guide vessels into?+
Ao Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Tomioka, Tokushima at 1.9 NM to the WNW. Other ports served include Tachibana (4.1 NM SW), Anan (4.4 NM SW), Komatsushima (7.1 NM NW), Tokushima (10.2 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ao Shima Lighthouse still active and maintained?+
Yes, Ao 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.
What shipping routes pass near Ao Shima Lighthouse?+
Ao Shima Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Ao Shima Lighthouse?+
You can track vessels near Ao 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.