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Kojirahama Kō Lighthouse

Fl Red 3s🇯🇵Kamaishi, JPOperational

Location & Light Range

About Kojirahama Kō Lighthouse

Also known as: #Kojirahama Kō

This red cylindrical concrete post, standing 9 meters tall, was first lit in 2018. It is situated on the breakwater at Kojirahama Kō, guiding vessels toward Kamaishi. The focal height of the light is 11 meters, and it emits a red flash every 3 seconds. The previous structure was destroyed by the 2011 tsunami. Following the disaster, a temporary buoy marked the entrance until the current light was installed in March 2018. Its geographic range is 10.7 nautical miles.

Why it matters: This light is essential for local fishing vessels and small craft, providing critical guidance as they navigate the entrance to Kojirahama Kō. Its red flash warns mariners of the breakwater's presence, ensuring safe passage into the protected harbor.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

First Lit
2018

Significant events: Destroyed by tsunami in 2011, replaced by buoy, new light installed in March 2018

References & Identifiers

Nearest Port
Kamaishi(4.0 km)
Admiralty No.
M6588.4
NGA No.
4140
ARLHS No.
JPN-1108

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: A 9m cylindrical concrete post, painted red.

Location

City
Kamaishi
Country
🇯🇵Japan
Region
Iwate Prefecture
Sea Region
breakwater at Kojirahama Kō
Latitude
39.2049°
Longitude
141.8691°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Kojirahama Kō Lighthouse at night?+
Kojirahama Kō displays the characteristic Fl Red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Kojirahama Kō Lighthouse guide vessels into?+
Kojirahama Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Kamaishi at 4 NM to the NNE. Other ports served include Otsuchi (4 NM NNE), Tagi (4 NM NNE), Sakihama (6.2 NM S), Nojiri (11.2 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kojirahama Kō Lighthouse still active and maintained?+
Yes, Kojirahama 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 Kojirahama Kō Lighthouse?+
Kojirahama 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 Kojirahama Kō Lighthouse?+
You can track vessels near Kojirahama 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.