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Aosa Saki Lighthouse

Fl White 4s🇯🇵Hirado, JPOperational

Location & Light Range

About Aosa Saki Lighthouse

Established in 1944, the Aosa Saki lighthouse is a white concrete post standing 8.5 meters tall, emerging from a 1-story concrete equipment building. Its focal plane sits 10 meters above sea level. The lighthouse emits a single white flash every 4 seconds, visible for 10.4 nautical miles. It is situated at the tip of a promontory forming the southern entrance to the Hirado Strait. The nearest port, Tabira, is 2 kilometers away.

Why it matters: This lighthouse is essential for safe passage through the southern entrance of the Hirado Strait, a busy waterway. Its light provides a consistent reference for vessels navigating this geographically complex area.

Light & Optic

Characteristic Signature
Fl White 4s
Flash Type
Flashing
Light Color
White
Interval
4s
Raw Code
Fl W 4s
Focal Height
10m
Geographic Range
10.4NM

Construction & History

Year Built
1944

References & Identifiers

Nearest Port
Tabira(2.0 km)
Admiralty No.
M5242.4
NGA No.
12020
ARLHS No.
JPN-2157

Tower & Structure

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

Structure: A 8.5m white concrete post rising from a 1-story concrete equipment room.

Location

City
Hirado
Country
🇯🇵Japan
Region
Nagasaki Prefecture
Sea Region
Located at the tip of a promontory of the mainland at the southern entrance to the Hirado Strait.
Latitude
33.3315°
Longitude
129.5614°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Aosa Saki Lighthouse at night?+
Aosa Saki displays the characteristic Fl White 4s. 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 Aosa Saki Lighthouse guide vessels into?+
Aosa Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Tabira at 2 NM to the NNE. Other ports served include Kawachi, Nagasaki (2.2 NM W), Hirado (2.3 NM N), Emukae (2.6 NM ESE), Shikamachi (3.7 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Aosa Saki Lighthouse still active and maintained?+
Yes, Aosa Saki 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 Aosa Saki Lighthouse?+
Aosa Saki 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 Aosa Saki Lighthouse?+
You can track vessels near Aosa Saki 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.