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Okushiri Kō Lighthouse

Fl Green 3s🇯🇵Okushiri, JPOperational

Location & Light Range

About Okushiri Kō Lighthouse

The Okushiri Kō lighthouse, first illuminated in 1966, is a white, cylindrical concrete tower measuring 11 meters in height. Its lantern, situated 12 meters above sea level, casts a green light with a characteristic of Fl G 3s, observable up to 11 nautical miles. The structure features a round, hourglass form topped with a lantern and gallery. It is located on a detached breakwater guarding the Okushiri harbor entrance on the eastern side of Okushiri island, approximately 0.3 km from the port. Evidence indicates a possible move from an earlier east breakwater location.

Why it matters: This navigation aid marks the detached breakwater, providing a reference for vessels entering Okushiri harbor.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
12m
Geographic Range
11NM

Construction & History

First Lit
1966

Significant events: Probably relocated from original east breakwater

References & Identifiers

Nearest Port
Okushiri(0.3 km)
Admiralty No.
M7021
NGA No.
1088

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round hourglass-shaped concrete tower with lantern and gallery, painted white

Location

City
Okushiri
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
Located at the end of a detached breakwater protecting the entrance to Okushiri harbor, on the east side of Okushiri island.
Latitude
42.1809°
Longitude
139.5276°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Okushiri Kō Lighthouse at night?+
Okushiri Kō displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Okushiri Kō Lighthouse guide vessels into?+
Okushiri Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Okushiri at 0.3 NM to the WSW. Other ports served include Aonae (8 NM SSW), Setana (21.4 NM NE), Motomachi (29.8 NM ESE), Esashi/Hiyama (32.5 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Okushiri Kō Lighthouse still active and maintained?+
Yes, Okushiri 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 Okushiri Kō Lighthouse?+
You can track vessels near Okushiri 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.