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Ura Ko Lighthouse

Iso G 4s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Ura Ko Lighthouse

This white metal tower stands 28 meters tall. The light emitted from the structure has a focal height of 11 meters. It displays an isophase green light that completes a cycle every 4 seconds. The geographic range of the light is 5 nautical miles. This navigational aid is located in Seto Naikai Eastern.

Light & Optic

Characteristic Signature
Iso G 4s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Iso.G. period 4s
Focal Height
11m
Light Range
5NM (9.3 km)
Geographic Range
5NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.5434°
Longitude
134.9967°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
28m
Tower Color
white
Material
metal

Structure: White tower; 28

References & Identifiers

Admiralty No.
M5828
NGA No.
7628
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Frequently Asked Questions

How far offshore can Ura Ko Lighthouse be seen?+
With a focal height of 11 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Ura Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Ura Ko Lighthouse at night?+
Ura Ko displays the characteristic Iso G 4s — 1 green 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. The green color may indicate a specific sector or warning zone.
Which ports and harbors does Ura Ko Lighthouse guide vessels into?+
Ura Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Iwaya at 3.2 NM to the NNE. Other ports served include Akashi (6 NM N), Eigashima (8.9 NM NNW), Kobe (11.9 NM NE), Higashiharima (12.4 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ura Ko Lighthouse still active and maintained?+
Yes, Ura Ko 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 Ura Ko Lighthouse?+
Ura Ko 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 Ura Ko Lighthouse?+
You can track vessels near Ura Ko 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.