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Mimaisaki Lighthouse

Iso W 6s🇯🇵Seto Naikai Western, JPOperational

Location & Light Range

About Mimaisaki Lighthouse

Mimaisaki Lighthouse is a white, mast-shaped concrete structure standing 33 meters high. Its focal plane is 73 meters above sea level. The light characteristic is an isophase white signal, repeating every 6 seconds. It has a geographic range of 8 nautical miles. The lighthouse is operational.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
73m
Light Range
8NM (14.8 km)
Geographic Range
8NM

Location

City
Seto Naikai Western
Country
🇯🇵JP
Latitude
33.4193°
Longitude
132.1228°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
33m
Tower Shape
mast
Tower Color
white
Material
concrete

Structure: White concrete column; 33

References & Identifiers

Admiralty No.
M5426
NGA No.
9292
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Frequently Asked Questions

How far offshore can Mimaisaki Lighthouse be seen?+
With a focal height of 73 meters and a nominal range of 8 nautical miles (approximately 14.8 km), Mimaisaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Mimaisaki Lighthouse at night?+
Mimaisaki displays the characteristic Iso W 6s — 1 white flash 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.
Which ports and harbors does Mimaisaki Lighthouse guide vessels into?+
Mimaisaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Misaki, Ehime at 2.1 NM to the SSW. Other ports served include MITSUKE (6.7 NM ENE), Ikata (12.1 NM ENE), Kawanoishi (13.8 NM ENE), Mikame (14.8 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Mimaisaki Lighthouse still active and maintained?+
Yes, Mimaisaki 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 Mimaisaki Lighthouse?+
Mimaisaki 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 Mimaisaki Lighthouse?+
You can track vessels near Mimaisaki 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.