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Iduhara Lighthouse

Iso R 4s🇯🇵Tsushima, JPOperational

Location & Light Range

About Iduhara Lighthouse

The Iduhara Lighthouse stands 13 meters above sea level. It provides an isophase white light, which repeats its cycle every 6 seconds. This light has a geographic range of 8 nautical miles. The lighthouse is operational.

Light & Optic

Characteristic Signature
Iso R 4s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Iso.W. period 6s
Focal Height
13m
Geographic Range
8NM

References & Identifiers

Admiralty No.
M5047
NGA No.
12564

Location

City
Tsushima
Country
🇯🇵JP
Latitude
34.1914°
Longitude
129.2997°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Iduhara Lighthouse at night?+
Iduhara displays the characteristic Iso R 4s — 1 red flash every 4 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 Iduhara Lighthouse guide vessels into?+
Iduhara Lighthouse assists vessels approaching 5 nearby ports. The closest is Izuhara at 0.4 NM to the WNW. Other ports served include Hara (0.5 NM N), Se/Izuhara (0.5 NM N), Koura, Kagawa (1.7 NM N), Kechi (4.3 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Iduhara Lighthouse still active and maintained?+
Yes, Iduhara 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 Iduhara Lighthouse?+
Iduhara 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 Iduhara Lighthouse?+
You can track vessels near Iduhara 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.