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Otona Se Lighthouse

Fl (2) White 5s🇯🇵Shinkamigotō, JPOperational

Location & Light Range

About Otona Se Lighthouse

The Otona Se lighthouse was established in 1951 on a concrete pier positioned on a reef 2.5 kilometers east of Sao Saki. This cylindrical concrete tower, measuring 16 meters high, is painted black with a red horizontal band. Its light emits two white flashes every five seconds from a focal height of 20 meters, with a geographic range of 13.2 nautical miles. The site is open to visitors, though the tower itself is closed to the public. The nearest port, Shukunoura, is 4.8 kilometers away.

Why it matters: This lighthouse warns vessels of a submerged reef east of Sao Saki, serving as a critical guide for maritime traffic navigating the coastal waters.

Light & Optic

Characteristic Signature
Fl (2) White 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl W 5s
Focal Height
20m
Geographic Range
13.2NM

Construction & History

Year Built
1951

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
16m
Tower Shape
cylindrical
Tower Color
black with a red horizontal band and mounted on a round concrete pier
Material
concrete

Structure: round tapered concrete tower, painted black with a red horizontal band and mounted on a round concrete pier

Location

City
Shinkamigotō
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
Located on a reef about 2.5 km east of Sao Saki.
Latitude
32.8202°
Longitude
129.0860°

References & Identifiers

Nearest Port
Shukunoura(4.8 km)
Admiralty No.
M5010
NGA No.
12860
ARLHS No.
JPN-073
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Frequently Asked Questions

How do mariners identify Otona Se Lighthouse at night?+
Otona Se displays the characteristic Fl (2) White 5s — 2 white flashes every 5 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Otona Se Lighthouse guide vessels into?+
Otona Se Lighthouse assists vessels approaching 5 nearby ports. The closest is Arao at 1.6 NM to the NW. Other ports served include Narao (1.6 NM NW), Aokata (9.8 NM N), Arikawa (9.8 NM N), Enokizu (9.8 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Otona Se Lighthouse still active and maintained?+
Yes, Otona Se 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 Otona Se Lighthouse?+
Otona Se 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 Otona Se Lighthouse?+
You can track vessels near Otona Se 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.