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Megawa Lighthouse

Fl Red 6s🇯🇵Onagawa, JPOperational

Location & Light Range

About Megawa Lighthouse

Also known as: #Megawa (Onogawa) Kō North Breakwater

Megawa Lighthouse, a cylindrical concrete tower standing 10 meters tall, began operation in 1967. Its structure is described as a round hourglass shape. It emits a red light that flashes once every 6 seconds. The focal height is also 10 meters, with a geographic range of 10.4 nautical miles. This lighthouse is situated very near the port of Onagawa, just 0.5 kilometers away. It is listed under the ARLHS number JPN-1160.

Why it matters: The lighthouse's red flash every 6 seconds helps differentiate it from other lights, aiding local fishing boats and coastal cargo vessels in navigating potentially hazardous areas along the Japanese coastline. Its presence contributes to the safety and efficiency of coastal shipping routes.

Light & Optic

Characteristic Signature
Fl Red 6s
Flash Type
Flashing
Light Color
Red
Interval
6s
Raw Code
Fl R 6s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1967

References & Identifiers

Nearest Port
Onagawa(0.5 km)
Admiralty No.
M6550.
NGA No.
4328
ARLHS No.
JPN-1160

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Material
concrete

Structure: round hourglass-shaped concrete tower

Location

City
Onagawa
Country
🇯🇵Japan
Region
Miyagi Prefecture
Latitude
38.4368°
Longitude
141.4637°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Megawa Lighthouse at night?+
Megawa displays the characteristic Fl Red 6s. 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 Megawa Lighthouse guide vessels into?+
Megawa Lighthouse assists vessels approaching 5 nearby ports. The closest is Onagawa at 0.4 NM to the WNW. Other ports served include Akehama (1 NM NW), Hamaguri (1 NM NW), Nonohama (1 NM NW), Ogatsu (1 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Megawa Lighthouse still active and maintained?+
Yes, Megawa 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 Megawa Lighthouse?+
Megawa 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 Megawa Lighthouse?+
You can track vessels near Megawa 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.