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Ōigawa Kō Lighthouse

Fl Green 3s🇯🇵Yaizu, JPOperational

Location & Light Range

About Ōigawa Kō Lighthouse

Also known as: Ōigawa Kō (South Breakwater)

The Ōigawa Kō lighthouse is a white concrete post structure, standing 8.5 meters tall, located at the south entrance to the Ōigawa harbor basin. Rising from a square, single-story equipment shelter, the lighthouse features a lantern room at its peak. Its focal height reaches 14 meters, projecting a green flashing light that cycles every 3 seconds. This aid offers a geographic range of 11.6 nautical miles. The site is open to the public, though the tower itself is closed to visitors. It marks the entrance to Ōigawa harbor, south of Yaizu.

Why it matters: This lighthouse guides vessels into the Ōigawa harbor basin and is accessible via a nearby pier.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
14m
Geographic Range
11.6NM

Location

City
Yaizu
Country
🇯🇵Japan
Region
Shizuoka Prefecture
Sea Region
Ōigawa harbor basin, marking the entrance to Ōigawa harbor at the south end of Yaizu, Japan.
Latitude
34.7776°
Longitude
138.3056°

References & Identifiers

Nearest Port
Yoshiase(0.7 km)
ARLHS No.
JPN-1438

Tower & Structure

Tower Height
8.5m
Tower Shape
post
Tower Color
white
Material
concrete

Structure: A 8.5m concrete post with lantern, rising from a square 1-story concrete equipment shelter. The entire lighthouse is white.

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ōigawa Kō Lighthouse at night?+
Ōigawa Kō displays the characteristic Fl Green 3s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Ōigawa Kō Lighthouse guide vessels into?+
Ōigawa Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Ohigawa at 0.5 NM to the WNW. Other ports served include Yaizu (5.5 NM NNE), Shimada (6.9 NM WNW), Sagara (7.3 NM SW), Omaezaki (10.5 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōigawa Kō Lighthouse still active and maintained?+
Yes, Ōigawa Kō 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 Ōigawa Kō Lighthouse?+
Ōigawa Kō 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 Ōigawa Kō Lighthouse?+
You can track vessels near Ōigawa Kō 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.