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Yokohama South Outer Breakwater Lighthouse

Fl White 15s🇯🇵Yokohama, JPOperational

Location & Light Range

About Yokohama South Outer Breakwater Lighthouse

Built in 1939, this cylindrical concrete lighthouse stands 24 meters tall, with its focal plane at 47 meters. The white tower features a lantern and gallery, and is connected to a two-story service building. Its light characteristic was a white flash, visible for 19 nautical miles. This structure was located at the north end of the south outer breakwater of Yokohama Inner Harbor, near the Yokohama Harbor Bridge. The lighthouse has been inactive since 2019. Access is restricted to boats, and the tower remains closed to the public.

Why it matters: Its primary function was to mark the south outer breakwater, a significant navigational aid for vessels entering the high-traffic Yokohama Inner Harbor.

Light & Optic

Characteristic Signature
Fl White 15s
Flash Type
Flashing
Light Color
White
Interval
15s
Raw Code
Fl.W
Focal Height
47m
Geographic Range
19NM

Construction & History

Year Built
1939

Significant events: Inactive since 2019

References & Identifiers

Nearest Port
Yokohama(4.2 km)
Admiralty No.
M6402
NGA No.
5188
ARLHS No.
JPN-1420

Tower & Structure

Tower Height
24m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery, attached to a square 2-story service building or keeper's house

Location

City
Yokohama
Country
🇯🇵Japan
Region
Kanagawa Prefecture
Sea Region
North end of the south outer breakwater of Yokohama Inner Harbor, just outside the Yokohama Harbor Bridge
Latitude
35.4526°
Longitude
139.6740°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Yokohama South Outer Breakwater Lighthouse at night?+
Yokohama South Outer Breakwater displays the characteristic Fl White 15s. 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 Yokohama South Outer Breakwater Lighthouse guide vessels into?+
Yokohama South Outer Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Yokohama at 2.5 NM to the SSW. Other ports served include Asahimachi (5 NM NNE), Higashi-Ogishima (5.3 NM ENE), Kawasaki (5.5 NM NE), Tsuzuki Ku (7.1 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yokohama South Outer Breakwater Lighthouse still active and maintained?+
Yes, Yokohama South Outer 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 Yokohama South Outer Breakwater Lighthouse?+
Yokohama South Outer 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 Yokohama South Outer Breakwater Lighthouse?+
You can track vessels near Yokohama South Outer 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.