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Nishiura Oki Lighthouse

Fl White 5s🇯🇵Imabari, JPOperational

Location & Light Range

About Nishiura Oki Lighthouse

Also known as: Nisiura

Established in 1966, this lighthouse features a 9-meter octagonal stone tower housing a lantern and gallery. The tower is directly attached to a single-story stone keeper's cottage, reflecting a design for close operational integration. Its white light emits one flash every five seconds, providing a geographic range of 10.4 nautical miles. The lighthouse is situated near Imabari in Ehime Prefecture, Japan, with its nearest port being Namikata, 1.7 kilometers away. While visitors can access the site, the tower itself remains closed to the public.

Why it matters: The lighthouse continues to guide local fishing fleets and coastal shipping. Its integrated keeper's cottage offers a rare insight into historical lighthouse operations.

Light & Optic

Characteristic Signature
Fl White 5s
Flash Type
Flashing
Light Color
White
Interval
5s
Raw Code
Fl W 5s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1966

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9m
Tower Shape
octagonal
Tower Color
red
Material
stone

Structure: octagonal stone tower with lantern and gallery, attached to a small 1-story stone keeper's cottage

Location

City
Imabari
Country
🇯🇵Japan
Region
Ehime Prefecture
Latitude
34.1456°
Longitude
132.9346°

References & Identifiers

Nearest Port
Namikata(1.7 km)
Admiralty No.
M5452
NGA No.
8764
ARLHS No.
JPN-779
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Frequently Asked Questions

How do mariners identify Nishiura Oki Lighthouse at night?+
Nishiura Oki displays the characteristic Fl White 5s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Nishiura Oki Lighthouse guide vessels into?+
Nishiura Oki Lighthouse assists vessels approaching 5 nearby ports. The closest is Namikata at 1.6 NM to the SE. Other ports served include Hashihama (2.8 NM SE), Okamura (3.2 NM NW), Yoshiumi (5 NM E), Kinoe (5.5 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Nishiura Oki Lighthouse still active and maintained?+
Yes, Nishiura Oki 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 Nishiura Oki Lighthouse?+
Nishiura Oki 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 Nishiura Oki Lighthouse?+
You can track vessels near Nishiura Oki 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.