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Ōma Saki Lighthouse

Fl (3) White 30s🇯🇵Oma, JPOperational

Location & Light Range

About Ōma Saki Lighthouse

Ōma Saki Lighthouse, established in 1921, is a 25-meter cylindrical concrete tower situated on a small island off the cape near Ōma. It features black and white horizontal bands and rises from a two-story keeper's house. The light emits a single white flash every 30 seconds, visible for 16.4 nautical miles. This lighthouse marks the northernmost point of Honshū and the narrowest section of the Tsugaru Strait. Its nearest port, Ōma, is 1.7 kilometers away.

Why it matters: This lighthouse is indispensable for safe passage through the Tsugaru Strait, a critical shipping lane. It warns mariners about the narrowest section of the strait, guiding vessels navigating between Honshū and Hokkaidō.

Light & Optic

Characteristic Signature
Fl (3) White 30s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
30s
Raw Code
Fl W 30s
Focal Height
36m
Geographic Range
16.4NM

Construction & History

Year Built
1921

References & Identifiers

Nearest Port
Oma(1.7 km)
ARLHS No.
JPN-2636

Tower & Structure

Tower Height
25m
Tower Shape
cylindrical
Tower Color
with black and white horizontal bands
Material
concrete

Structure: round cylindrical concrete tower rising from one corner of a 2-story keeper's house

Location

City
Oma
Country
🇯🇵Japan
Region
Aomori Prefecture
Sea Region
Marks the northernmost point of Honshū and the narrowest point of the Tsugaru Strait. Located on a small island off the point of the cape near the town of Ōma, 18 km north to Siokubi Misaki, Hokkaidō.
Latitude
41.5547°
Longitude
140.9117°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ōma Saki Lighthouse at night?+
Ōma Saki displays the characteristic Fl (3) White 30s — 3 white flashes every 30 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Ōma Saki Lighthouse guide vessels into?+
Ōma Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Oma at 1.5 NM to the S. Other ports served include Sai, Aomori (7.6 NM SSW), Soya (10 NM SSW), Toyoura (13.5 NM NNE), Ohata (14.7 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōma Saki Lighthouse still active and maintained?+
Yes, Ōma Saki 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 Ōma Saki Lighthouse?+
Ōma Saki 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 Ōma Saki Lighthouse?+
You can track vessels near Ōma Saki 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.