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Yobuko Kō East Entrance South Breakwater Lighthouse

F Green 3s🇯🇵Karatsu, JPOperational

Location & Light Range

About Yobuko Kō East Entrance South Breakwater Lighthouse

A concrete post attached to a one-story equipment building, this lighthouse was first lit in 1974. It stands 8.5 meters tall with its light at a focal height of 10 meters. The structure is painted white and emits a single green flash every 3 seconds. It is situated at the extremity of the south breakwater, marking the eastern entrance to Yobuko harbor. This location is on the south side of the harbor entrance, east of Kabe Shima island.

Why it matters: This lighthouse warns mariners of the breakwater's end, safeguarding vessels entering or leaving Yobuko harbor from the east.

Light & Optic

Characteristic Signature
F Green 3s
Flash Type
Fixed
Light Color
Green
Interval
3s
Raw Code
F.Fl G 3s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1974

References & Identifiers

Nearest Port
Yobuko(0.6 km)
Admiralty No.
M5266.4
NGA No.
12204
ARLHS No.
JPN-2356

Tower & Structure

Tower Height
8.5m
Tower Shape
square
Tower Color
white
Material
concrete

Structure: concrete post attached to a 1-story concrete equipment building

Location

City
Karatsu
Country
🇯🇵Japan
Region
Saga Prefecture
Sea Region
Located at the end of a breakwater on the south side of the entrance to Yobuko harbor east of Kabe Shima.
Latitude
33.5511°
Longitude
129.8950°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Yobuko Kō East Entrance South Breakwater Lighthouse at night?+
Yobuko Kō East Entrance South Breakwater displays the characteristic F Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Yobuko Kō East Entrance South Breakwater Lighthouse guide vessels into?+
Yobuko Kō East Entrance South Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Yobuko at 0.5 NM to the S. Other ports served include Tobo (4.5 NM SSE), Karatsu (5.4 NM SE), Fukushima, Nagasaki (13 NM SSW), Kafuri (13.2 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Yobuko Kō East Entrance South Breakwater Lighthouse still active and maintained?+
Yes, Yobuko Kō East Entrance South 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 Yobuko Kō East Entrance South Breakwater Lighthouse?+
Yobuko Kō East Entrance South 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 Yobuko Kō East Entrance South Breakwater Lighthouse?+
You can track vessels near Yobuko Kō East Entrance South 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.