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Tomiiso Kō Lighthouse

F Green 6s🇯🇵Wakkanai, JPOperational

Location & Light Range

About Tomiiso Kō Lighthouse

The Tomiiso Kō lighthouse was established in 1964 as a white, cylindrical concrete tower standing 10 meters tall. It is positioned at the end of the main breakwater for Tomiiso, a fishing port located about 12 kilometers southwest of Cape Sōya. The structure features a lantern and gallery and emits a green flashing light every 6 seconds. This light is visible for over 11 nautical miles. The site is open to the public, though the tower itself is closed.

Why it matters: This lighthouse is indispensable for fishing vessels entering Tomiiso port, providing a clear signal for navigating the breakwater, particularly in poor visibility or at night.

Light & Optic

Characteristic Signature
F Green 6s
Flash Type
Fixed
Light Color
Green
Interval
6s
Raw Code
F.Fl G 6s
Focal Height
13m
Geographic Range
11.3NM

Construction & History

Year Built
1964

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery, painted white

Location

City
Wakkanai
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
Located at the end of the main breakwater of Tomiiso, a fishing port about 12 km (7.5 mi) southwest of Cape Sōya.
Latitude
45.4628°
Longitude
141.8750°

References & Identifiers

Nearest Port
Wakkanai(8.3 km)
Admiralty No.
M6898
NGA No.
1516
ARLHS No.
JPN-999
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Frequently Asked Questions

How do mariners identify Tomiiso Kō Lighthouse at night?+
Tomiiso Kō displays the characteristic F Green 6s. 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 Tomiiso Kō Lighthouse guide vessels into?+
Tomiiso Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Nishibe at 14.3 NM to the ESE. Other ports served include Onishi (14.3 NM ESE), Hamasarufutsu (19.2 NM SE), Oshidomari (30.3 NM WSW), Shido (30.3 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tomiiso Kō Lighthouse still active and maintained?+
Yes, Tomiiso 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 Tomiiso Kō Lighthouse?+
You can track vessels near Tomiiso 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.