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Sai Kō Lighthouse

Fl (2) R 6s🇯🇵Northern Honshū, JPOperational

Location & Light Range

About Sai Kō Lighthouse

Sai Kō is a lighthouse located at the end of the main breakwater in the small port of Sai, Northern Honshū. The round concrete tower stands 9 meters tall and was built in 1997. It features a flared top and gallery but lacks a lantern room. The structure is painted red and emits two red flashes every 6 seconds from a focal height of 13 meters. Its geographic range is 4 nautical miles.

Light & Optic

Characteristic Signature
Fl (2) R 6s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
6s
Raw Code
Fl.(2)R. period 6s
Focal Height
13m
Geographic Range
4NM

Construction & History

Year Built
1997

References & Identifiers

Admiralty No.
M6636.7
NGA No.
3816
ARLHS No.
JPN-1089

Tower & Structure

Tower Shape
round
Tower Color
red
Material
concrete

Location

City
Northern Honshū
Country
🇯🇵JP
Latitude
41.4365°
Longitude
140.8604°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Sai Kō Lighthouse at night?+
Sai Kō displays the characteristic Fl (2) R 6s — 2 red flashes every 6 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 Sai Kō Lighthouse guide vessels into?+
Sai Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Sai, Aomori at 0.1 NM to the S. Other ports served include Soya (2.6 NM SSW), Oma (6 NM NNE), Hotokegaura (7.9 NM SSW), Ohata (14.1 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sai Kō Lighthouse still active and maintained?+
Yes, Sai 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.
What shipping routes pass near Sai Kō Lighthouse?+
Sai Kō 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 Sai Kō Lighthouse?+
You can track vessels near Sai 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.