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Hamada Ko Lighthouse

Iso R 4s🇯🇵Honshu-Northwest Coast, JPOperational

Location & Light Range

About Hamada Ko Lighthouse

The Hamada Ko lighthouse is a white metal mast structure standing 25 meters high on the Honshu-Northwest Coast. Its focal height is 13 meters above sea level. The lighthouse emits an isophase red light, which cycles every 4 seconds. Additionally, the structure includes a foghorn that sounds a 2-second blast every 20 seconds. This horn is directed towards the 52-degree bearing.

Light & Optic

Characteristic Signature
Iso R 4s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Iso.R. period 4s
Focal Height
13m
Light Range
4NM (7.4 km)
Geographic Range
4NM

Location

City
Honshu-Northwest Coast
Country
🇯🇵JP
Latitude
34.8790°
Longitude
132.0478°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
25m
Tower Shape
mast
Tower Color
white
Material
metal

Structure: White structure; 25. Horn: 1bl. ev. 20s (bl. 2s, si. 18s) Horn points 52°

References & Identifiers

Admiralty No.
M7351
NGA No.
1848
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Frequently Asked Questions

How far offshore can Hamada Ko Lighthouse be seen?+
With a focal height of 13 meters and a nominal range of 4 nautical miles (approximately 7.4 km), Hamada Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Hamada Ko Lighthouse at night?+
Hamada Ko 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 Hamada Ko Lighthouse guide vessels into?+
Hamada Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Hamada at 0.3 NM to the SSE. Other ports served include Yoshiura (4.7 NM SW), Misumi, Shimane (8.1 NM SW), Masuda, Shimane (15.9 NM SW), Yunotsu (19.4 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Hamada Ko Lighthouse still active and maintained?+
Yes, Hamada Ko 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 Hamada Ko Lighthouse?+
Hamada Ko 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 Hamada Ko Lighthouse?+
You can track vessels near Hamada Ko 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.