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Ama Se Lighthouse

Fl Red 3s🇯🇵Imabari, JPOperational

Location & Light Range

About Ama Se Lighthouse

Also known as: Ama Se (Kuroshima Amase)

Built in 1965, Ama Se lighthouse is a cylindrical tower constructed of stone and concrete. It stands 10 meters tall with its focal height also at 10 meters. The structure features a round concrete tower with a double gallery, mounted on a round conical stone pier. This red tower emits a single red flash every 3 seconds, visible for 10.4 nautical miles. Ama Se is located approximately 0.6 kilometers from the port of Hashihama, south of the Imabari end of the Kurushima-Kaikyo Bridge in Ehime Prefecture. While the tower itself is closed to visitors, the site is accessible.

Why it matters: This lighthouse is essential for vessels navigating the Kurushima Strait, a waterway known for its strong and complex tidal currents, especially near the Imabari end of the Kurushima-Kaikyo Bridge. Its distinctive red flash helps mariners identify a key navigational point, ensuring safe passage through this challenging and busy maritime corridor.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1965

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
red
Material
stone, concrete

Structure: round concrete tower with double gallery, mounted on a round conical stone pier

Location

City
Imabari
Country
🇯🇵Japan
Region
Ehime Prefecture
Sea Region
Kurushima Strait, south of the Imabari end of the Kurushima-Kaikyo Bridge
Latitude
34.1116°
Longitude
132.9812°

References & Identifiers

Nearest Port
Hashihama(0.6 km)
Admiralty No.
M5463
NGA No.
8728
ARLHS No.
JPN-785
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Frequently Asked Questions

How do mariners identify Ama Se Lighthouse at night?+
Ama Se displays the characteristic Fl Red 3s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Ama Se Lighthouse guide vessels into?+
Ama Se Lighthouse assists vessels approaching 5 nearby ports. The closest is Hashihama at 0.5 NM to the W. Other ports served include Namikata (1.6 NM WNW), Imabari (3.4 NM SSE), Yoshiumi (3.9 NM NE), Okamura (6.3 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ama Se Lighthouse still active and maintained?+
Yes, Ama Se 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 Ama Se Lighthouse?+
Ama Se 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 Ama Se Lighthouse?+
You can track vessels near Ama Se 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.