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

Shichirui Kō Detached Breakwater Lighthouse

F Green 5s🇯🇵Matsue, JPOperational

Location & Light Range

About Shichirui Kō Detached Breakwater Lighthouse

This 9.5-meter cylindrical concrete post, painted white, stands at the north end of the detached breakwater at Shichirui. It features a one-story square concrete equipment room at its base and emits a single green flash every 5 seconds. The light has a geographic range of 10.7 nautical miles. The structure offers views from ferries sailing to the Oki Islands. The site is accessible, though the tower itself is closed to visitors.

Why it matters: This lighthouse is essential for safe navigation into Shichirui harbor, marking the breakwater's northern extremity and guiding ferries to the Oki Islands.

Light & Optic

Characteristic Signature
F Green 5s
Flash Type
Fixed
Light Color
Green
Interval
5s
Raw Code
F.Fl G 5s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Matsue
Country
🇯🇵Japan
Region
Shimane Prefecture
Sea Region
Located at the north end of the detached breakwater at Shichiuri, offering views from ferries sailing to the Oki Islands.
Latitude
35.5771°
Longitude
133.2315°

References & Identifiers

Nearest Port
Shichirui(0.2 km)
Admiralty No.
M7315.2
NGA No.
2024
ARLHS No.
JPN-1574

Tower & Structure

Tower Height
9.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: A 9.5m cylindrical concrete post with a 1-story square concrete equipment room at its base, painted white.

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
Live tracking · 50,000+ mariners

Find Shichirui Kō Detached Breakwater 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 Shichirui Kō Detached Breakwater Lighthouse at night?+
Shichirui Kō Detached Breakwater displays the characteristic F Green 5s. 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 Shichirui Kō Detached Breakwater Lighthouse guide vessels into?+
Shichirui Kō Detached Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Shichirui at 0.2 NM to the S. Other ports served include Hoda (1.1 NM ESE), Nagahama, Shimane (2.7 NM ESE), Karubi (3.3 NM E), Kaizaki (3.4 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Shichirui Kō Detached Breakwater Lighthouse still active and maintained?+
Yes, Shichirui Kō Detached 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 Shichirui Kō Detached Breakwater Lighthouse?+
Shichirui Kō Detached 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 Shichirui Kō Detached Breakwater Lighthouse?+
You can track vessels near Shichirui Kō Detached 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.