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Seki Kawa Lighthouse

Fl Red 3s🇯🇵Joetsu, JPOperational

Location & Light Range

About Seki Kawa Lighthouse

Also known as: Seki Kawa (Sekikawa)

A 9.5m red concrete post is fixed to a square, 1-story concrete equipment shelter. This structure is situated on a detached breakwater at the western entrance of the Seki River in Joetsu, Niigata Prefecture, Japan. It shows a red flash each three seconds, with a range of 11.6 nautical miles. Access is limited to maritime approaches.

Why it matters: The Seki Kawa light marks the entrance to the Seki River, providing a reference point for ships approaching or leaving the Naoetsu port area.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
14m
Geographic Range
11.6NM

Location

City
Joetsu
Country
🇯🇵Japan
Region
Niigata Prefecture
Sea Region
Located on a detached breakwater on the west side of the mouth of the Seki River in Jōetsu, Japan.
Latitude
37.1816°
Longitude
138.2454°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9.5m
Tower Shape
post
Tower Color
red
Material
concrete

Structure: A 9.5m red concrete post attached to a square 1-story concrete equipment shelter.

References & Identifiers

Nearest Port
Naoetsu(1.6 km)
Admiralty No.
M7128
NGA No.
3196
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Frequently Asked Questions

How do mariners identify Seki Kawa Lighthouse at night?+
Seki Kawa 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 Seki Kawa Lighthouse guide vessels into?+
Seki Kawa Lighthouse assists vessels approaching 5 nearby ports. The closest is Aoe at 0.2 NM to the ENE. Other ports served include Naoetsu (1 NM NE), Joetsu (2 NM SSW), Kashiwazaki (17.9 NM NE), Awa (20.9 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seki Kawa Lighthouse still active and maintained?+
Yes, Seki Kawa 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 Seki Kawa Lighthouse?+
Seki Kawa 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 Seki Kawa Lighthouse?+
You can track vessels near Seki Kawa 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.