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Onejime Ko Lighthouse

Fl G 3s🇯🇵Kyushu-South Coast, JPOperational

Location & Light Range

About Onejime Ko Lighthouse

Onejime Ko is an operational lighthouse situated on the Kyushu-South Coast. Its focal height reaches 11 meters above sea level. The lighthouse emits a single green flash, repeating every 3 seconds. This light has a geographic range of 5 nautical miles.

Light & Optic

Characteristic Signature
Fl G 3s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
3s
Raw Code
Fl.G. period 3s
Focal Height
11m
Light Range
5NM (9.3 km)
Geographic Range
5NM

References & Identifiers

Admiralty No.
M4821.2
NGA No.
11036

Location

City
Kyushu-South Coast
Country
🇯🇵JP
Latitude
31.2531°
Longitude
130.7877°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Onejime Ko Lighthouse be seen?+
With a focal height of 11 meters and a nominal range of 5 nautical miles (approximately 9.3 km), Onejime 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 Onejime Ko Lighthouse at night?+
Onejime Ko displays the characteristic Fl G 3s — 1 green flash every 3 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 Onejime Ko Lighthouse guide vessels into?+
Onejime Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Nejime at 2.6 NM to the SSW. Other ports served include Uomi (6.5 NM W), Ibusuki (7 NM W), Yamagawa (8.4 NM WSW), Kanoya (8.8 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Onejime Ko Lighthouse still active and maintained?+
Yes, Onejime 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 Onejime Ko Lighthouse?+
Onejime 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 Onejime Ko Lighthouse?+
You can track vessels near Onejime 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.