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Ōhara Kō Lighthouse

Iso W 4s🇯🇵Eastern Honshū (Ibaraki and Chiba), JPOperational

Location & Light Range

About Ōhara Kō Lighthouse

This metal mast lighthouse stands 14 meters tall, with a focal height of 14 meters. The tower is painted green. It emits a white flashing light. The structure is located on Eastern Honshū, an area encompassing parts of Ibaraki and Chiba prefectures.

Light & Optic

Characteristic Signature
Iso W 4s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl
Focal Height
14m
Geographic Range
5NM

Location

City
Eastern Honshū (Ibaraki and Chiba)
Country
🇯🇵JP
Latitude
35.2564°
Longitude
140.4068°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
14m
Tower Shape
mast
Tower Color
green
Material
metal

Structure: White tower; 32

References & Identifiers

Admiralty No.
M6470.9
NGA No.
4818
OpenStreetMap
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Frequently Asked Questions

How do mariners identify Ōhara Kō Lighthouse at night?+
Ōhara Kō displays the characteristic Iso W 4s — 1 white flash every 4 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.
Which ports and harbors does Ōhara Kō Lighthouse guide vessels into?+
Ōhara Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Wakura at 7.5 NM to the SSW. Other ports served include Okitsu, Chiba (10.7 NM SW), Abuto (18.4 NM SW), Togane (18.7 NM N), Futtsu, Chiba (19.7 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōhara Kō Lighthouse still active and maintained?+
Yes, Ōhara Kō 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 Ōhara Kō Lighthouse?+
Ōhara Kō 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 Ōhara Kō Lighthouse?+
You can track vessels near Ōhara Kō 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.