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Ogishima Lighthouse

Fl WRG 10s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Ogishima Lighthouse

Also known as: Ogishima Lighthouse

This round masonry tower stands 46 meters tall and exhibits a white and red color scheme. Its focal height is 16 meters, providing a geographic range of 12 nautical miles. The light emits white, red, and green signals, with a characteristic of one white flash every 10 seconds. Construction was completed in 1895 by Japanese efforts, marking the eastern edge of the Bisan Seto Eastern Shipping Route. It is one of only three lighthouses in Japan constructed of unpainted stone.

Why it matters: Designated an Important Cultural Property, this lighthouse is recognized for its high historical and cultural value and is included in Japan's Top 50 Lighthouses.

Light & Optic

Characteristic Signature
Fl WRG 10s
Flash Type
Flashing
Light Color
WRG
Flash Count
1 flash
Interval
10s
Raw Code
Fl.W.R.G. period 10s
Focal Height
16m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.4336°
Longitude
134.0607°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
46m
Tower Shape
round
Tower Color
white and red
Material
masonry

Structure: Round masonry tower; 46. G. 052°-073°, W.-081°, R.- 092°, W.-280°

References & Identifiers

Admiralty No.
M5538
NGA No.
8144
Wikipedia
Read on Wikipedia →
Wikidata
Q11578158 →
OpenStreetMap
View on OSM →
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Frequently Asked Questions

How far offshore can Ogishima Lighthouse be seen?+
With a focal height of 16 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Ogishima 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 Ogishima Lighthouse at night?+
Ogishima displays the characteristic Fl WRG 10s — 1 wrg flash every 10 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 wrg color may indicate a specific sector or warning zone.
Which ports and harbors does Ogishima Lighthouse guide vessels into?+
Ogishima Lighthouse assists vessels approaching 5 nearby ports. The closest is Ieura at 3.5 NM to the N. Other ports served include Naoshima (4.1 NM WNW), Takamatsu (4.3 NM SSW), Futamado (6.2 NM WNW), Futamata, Kagoshima (6.2 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ogishima Lighthouse still active and maintained?+
Yes, Ogishima 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 Ogishima Lighthouse?+
Ogishima 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 Ogishima Lighthouse?+
You can track vessels near Ogishima 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.