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Shigeru Inlet Breakwater Lighthouse

Iso G 6s🇯🇵Northern Honshū, JPOperational

Location & Light Range

About Shigeru Inlet Breakwater Lighthouse

This breakwater structure is a round, white concrete tower standing 12 meters high. It exhibits a green light, flashing once every 4 seconds. Additionally, the structure displays a white sector reaching 28 meters and a green sector extending to 24 meters. It also features a red occulting light operating on a 1.5-second cycle.

Light & Optic

Characteristic Signature
Iso G 6s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
6s
Raw Code
Fl.G. period 4s
Focal Height
12m
Geographic Range
5NM

Location

City
Northern Honshū
Country
🇯🇵JP
Latitude
40.9441°
Longitude
140.8692°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
round
Tower Color
white
Material
concrete

Structure: W. 28 G. 24 Oc.R. period 1.5s

References & Identifiers

Admiralty No.
M6643.5
NGA No.
3740
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Frequently Asked Questions

How do mariners identify Shigeru Inlet Breakwater Lighthouse at night?+
Shigeru Inlet Breakwater displays the characteristic Iso G 6s — 1 green flash 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 Shigeru Inlet Breakwater Lighthouse guide vessels into?+
Shigeru Inlet Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Taki at 5.3 NM to the E. Other ports served include Aomori (8.6 NM SW), Wakinosawa (12.3 NM N), Noheji (12.4 NM ESE), Tairadate (15.4 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Shigeru Inlet Breakwater Lighthouse still active and maintained?+
Yes, Shigeru Inlet Breakwater 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 Shigeru Inlet Breakwater Lighthouse?+
Shigeru Inlet Breakwater 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 Shigeru Inlet Breakwater Lighthouse?+
You can track vessels near Shigeru Inlet Breakwater 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.