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Kottoi Lighthouse

Occ WR 8s🇯🇵Honshu-Northwest Coast, JPOperational

Location & Light Range

About Kottoi Lighthouse

This lighthouse stands 16 meters tall, with its light positioned 27 meters above sea level. Built in 1912, its octagonal concrete tower is painted white. The light displays white or red depending on the direction of approach and has a characteristic of occulting once every 8 seconds. A continuous white spotlight also directs illumination towards a nearby stone beacon situated on a reef.

Light & Optic

Characteristic Signature
Occ WR 8s
Flash Type
Occ
Light Color
WR
Flash Count
1 flash
Interval
8s
Raw Code
F.R.
Focal Height
27m
Light Range
14NM (25.9 km)
Geographic Range
4NM

Construction & History

Year Built
1912

References & Identifiers

Admiralty No.
M7399
NGA No.
1564
ARLHS No.
JPN-291

Tower & Structure

Tower Height
16m
Tower Shape
octagonal
Tower Color
white and red
Material
concrete

Structure: White glass reinforced plastic(grp) fiberglass tower, red banded; 16

Location

City
Honshu-Northwest Coast
Country
🇯🇵JP
Latitude
34.3189°
Longitude
130.8920°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Kottoi Lighthouse be seen?+
With a focal height of 27 meters and a nominal range of 14 nautical miles (approximately 25.9 km), Kottoi 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 Kottoi Lighthouse at night?+
Kottoi displays the characteristic Occ WR 8s — 1 wr flash every 8 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 wr color may indicate a specific sector or warning zone.
Which ports and harbors does Kottoi Lighthouse guide vessels into?+
Kottoi Lighthouse assists vessels approaching 5 nearby ports. The closest is Kottoi at 0.2 NM to the SE. Other ports served include Tsunoshima (2.4 NM NW), Awano (4.5 NM ENE), Kogushi, Yamaguchi (8.7 NM SSE), Murotsu, Yamaguchi (10.9 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kottoi Lighthouse still active and maintained?+
Yes, Kottoi 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 Kottoi Lighthouse?+
Kottoi 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 Kottoi Lighthouse?+
You can track vessels near Kottoi 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.