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Kō Lighthouse

Fl R 4s🇯🇵Rishiri and Rebun, Hokkaido, JPOperational

Location & Light Range

About Kō Lighthouse

Kō Lighthouse is a concrete structure standing 30 meters tall. Its square tower, painted entirely red, houses a focal plane 13 meters above sea level. The light emits three white flashes every 9 seconds. This beacon operates on a 5 nautical mile geographic range. It is synchronized with another aid, K2242. The structure is built on piles.

Light & Optic

Characteristic Signature
Fl R 4s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Fl.(3)W. period 9s
Focal Height
13m
Geographic Range
5NM

Location

City
Rishiri and Rebun, Hokkaido
Country
🇯🇵JP
Latitude
45.4563°
Longitude
140.9779°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
square
Tower Color
red
Material
concrete

Structure: Red beacon, on pile; 30. Synchronized with K2242

References & Identifiers

Admiralty No.
M5772.5
NGA No.
7704
ARLHS No.
JPN-1538
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Frequently Asked Questions

How do mariners identify Kō Lighthouse at night?+
Kō displays the characteristic Fl R 4s — 1 red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Kō Lighthouse guide vessels into?+
Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Funadomari at 2.4 NM to the E. Other ports served include Fukai (7.8 NM SSE), Kafuka (9.9 NM SSE), Oshidomari (16.7 NM SE), Shido (16.7 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kō Lighthouse still active and maintained?+
Yes, 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.
How can I track vessels near Kō Lighthouse?+
You can track vessels near 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.