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Yokohama North Inner Breakwater Lighthouse

Oc Red 4s🇯🇵Yokohama, JPOperational

Location & Light Range

About Yokohama North Inner Breakwater Lighthouse

Built in 1896, this hexagonal pyramidal lighthouse stands on a detached breakwater in Yokohama's inner harbor. The structure, standing 15 meters tall, is colored red and features a cast iron tower with a lantern and gallery atop a concrete base. This concrete base was added following the 1923 earthquake to enhance stability. The lighthouse emits an occulting red light on a 4-second cycle, providing 11.9 nautical miles of geographic range. Access to the site and tower is restricted to boat only.

Why it matters: This lighthouse is important for guiding vessels through the inner harbor of Yokohama, a major international shipping hub.

Light & Optic

Characteristic Signature
Oc Red 4s
Flash Type
Occulting
Light Color
Red
Interval
4s
Raw Code
Oc R 4s
Focal Height
15m
Geographic Range
11.9NM

Construction & History

Year Built
1896

Significant events: concrete base added after 1923 earthquake

References & Identifiers

Nearest Port
Yokohama(4.9 km)
Admiralty No.
M6411
NGA No.
5200
ARLHS No.
JPN-1417

Tower & Structure

Tower Height
15m
Tower Shape
pyramidal
Tower Color
red
Material
concrete, cast iron

Structure: hexagonal pyramidal cast iron tower with lantern and gallery, mounted on a hexagonal concrete (?) base

Location

City
Yokohama
Country
🇯🇵Japan
Region
Kanagawa Prefecture
Sea Region
inner harbor of Yokohama, on a detached breakwater
Latitude
35.4601°
Longitude
139.6583°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Yokohama North Inner Breakwater Lighthouse at night?+
Yokohama North Inner Breakwater displays the characteristic Oc Red 4s. 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 Yokohama North Inner Breakwater Lighthouse guide vessels into?+
Yokohama North Inner Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Yokohama at 2.9 NM to the S. Other ports served include Asahimachi (4.8 NM NNE), Higashi-Ogishima (5.8 NM ENE), Kawasaki (5.8 NM NE), Tsuzuki Ku (6.3 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yokohama North Inner Breakwater Lighthouse still active and maintained?+
Yes, Yokohama North Inner 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 North Inner Breakwater Lighthouse?+
Yokohama North Inner 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 North Inner Breakwater Lighthouse?+
You can track vessels near Yokohama North Inner 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.