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Nakakoshiki Entry Lighthouse

Fl Red 4s🇯🇵Satsumasendai, JPOperational

Location & Light Range

About Nakakoshiki Entry Lighthouse

Also known as: Nakakoshiki Entry (Tsutsuminishi)

This red, cylindrical concrete tower stands 9 meters tall and has a focal height of 12 meters. It is situated on a breakwater that guides vessels under the bridge connecting Kami-Koshikijima to Nakakashika Shima. The light emits a single red flash every 4 seconds and has a geographic range of 11 nautical miles. The structure includes a 1-story concrete equipment room attached to the round tower. A 2024 video shows a speedboat passing the lighthouse.

Why it matters: This light is essential for maritime navigation, specifically directing ships through the narrow channel beneath the bridge linking Kami-Koshikijima and Nakakashika Shima.

Light & Optic

Characteristic Signature
Fl Red 4s
Flash Type
Flashing
Light Color
Red
Interval
4s
Raw Code
Fl R 4s
Focal Height
12m
Geographic Range
11NM

Construction & History

Significant events: speedboat passes in 2024 video

References & Identifiers

Nearest Port
Eishi(1.5 km)
Admiralty No.
M4995
NGA No.
11108
USCG No.
JCG-6584

Tower & Structure

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

Structure: round concrete tower attached to a square 1-story concrete equipment room

Location

City
Satsumasendai
Country
🇯🇵Japan
Region
Kagoshima Prefecture
Sea Region
Located on a breakwater (training wall) guiding ships under the bridge connecting Kami-Koshikijima to Nakakashika Shima.
Latitude
31.8299°
Longitude
129.8445°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Nakakoshiki Entry Lighthouse at night?+
Nakakoshiki Entry displays the characteristic Fl 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 Nakakoshiki Entry Lighthouse guide vessels into?+
Nakakoshiki Entry Lighthouse assists vessels approaching 5 nearby ports. The closest is Nakakoshiki at 0.9 NM to the ENE. Other ports served include Higashisonogi-Gun Cho (12.8 NM NNE), Teuchi (13.7 NM SSW), Satsumasendai (18 NM E), Hashima (19 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Nakakoshiki Entry Lighthouse still active and maintained?+
Yes, Nakakoshiki Entry 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 Nakakoshiki Entry Lighthouse?+
Nakakoshiki Entry 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 Nakakoshiki Entry Lighthouse?+
You can track vessels near Nakakoshiki Entry 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.