Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Hagi City: Ai Shima Lighthouse Lighthouse

Fl (2) White 21s🇯🇵Hagi, JPOperational

Location & Light Range

About Hagi City: Ai Shima Lighthouse Lighthouse

The Ai Shima Lighthouse is a cylindrical concrete tower situated near the northern tip of Ai Shima, an island roughly 15 kilometers northwest of Hagi. This structure, standing 10 meters tall, features a lantern and gallery. Its light emits a single white flash every 21 seconds from a focal height of 56 meters, providing a geographic range of 19.5 nautical miles. The lighthouse is accessible only by boat from the nearest port, Aishima, which is 1 kilometer away. Its operational status ensures it serves as a constant aid to navigation in the waters off Yamaguchi Prefecture.

Why it matters: This lighthouse warns mariners of the northern tip of Ai Shima, a hazard within coastal shipping lanes northwest of Hagi. Its distinctive semicircular cylindrical concrete tower also marks it as a unique architectural feature.

Light & Optic

Characteristic Signature
Fl (2) White 21s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
21s
Raw Code
Fl W 21s
Focal Height
56m
Geographic Range
19.5NM

Location

City
Hagi
Country
🇯🇵Japan
Region
Yamaguchi Prefecture
Sea Region
near the northern tip of Ai Shima (also called Ainoshima), a small island about 15 km northwest of Hagi.
Latitude
34.5165°
Longitude
131.2764°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: semicircular cylindrical concrete tower with lantern and gallery

References & Identifiers

Nearest Port
Aishima(1.0 km)
Admiralty No.
M7378
NGA No.
1632
USCG No.
JCG-0756
Live tracking · 50,000+ mariners

Find Hagi City: Ai Shima Lighthouse Lighthouse on the live nautical map

Plan voyages near Japan, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Hagi City: Ai Shima Lighthouse Lighthouse at night?+
Hagi City: Ai Shima Lighthouse displays the characteristic Fl (2) White 21s — 2 white flashes every 21 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 Hagi City: Ai Shima Lighthouse Lighthouse guide vessels into?+
Hagi City: Ai Shima Lighthouse Lighthouse assists vessels approaching 5 nearby ports. The closest is Hagi at 8.3 NM to the SE. Other ports served include Senzaki (8.5 NM SSW), Fukawa (9.1 NM SSW), Susa (17 NM ENE), Awano (17.9 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Hagi City: Ai Shima Lighthouse Lighthouse still active and maintained?+
Yes, Hagi City: Ai Shima Lighthouse 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 Hagi City: Ai Shima Lighthouse Lighthouse?+
Hagi City: Ai Shima Lighthouse 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 Hagi City: Ai Shima Lighthouse Lighthouse?+
You can track vessels near Hagi City: Ai Shima Lighthouse 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.