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Ōsaka Lighthouse

Fl White 5s🇯🇵Osaka, JPOperational

Location & Light Range

About Ōsaka Lighthouse

Also known as: Ōsaka (Radar Tower)

This gray concrete lighthouse stands 50 meters tall on the southeastern edge of a large artificial island constructed between Osaka's north and south harbors. Its cylindrical structure, built from concrete, features a round skeletal tower and two galleries at the top, which support various equipment. The light emits a single white flash every 5 seconds, visible for 19 nautical miles. It replaced an earlier, historic lighthouse that previously marked the original shoreline. The lighthouse is located 0.5 kilometers from Osaka's nearest port.

Why it matters: This lighthouse is indispensable for the safe navigation of vessels entering and departing Osaka's busy port, particularly given its integrated harbor control radar, which manages complex shipping movements.

Light & Optic

Characteristic Signature
Fl White 5s
Flash Type
Flashing
Light Color
White
Interval
5s
Raw Code
Fl W 5s
Focal Height
52m
Light Range
19NM (35.2 km)
Geographic Range
19NM

Construction & History

Significant events: Replaced a historic lighthouse

References & Identifiers

Nearest Port
Osaka(0.5 km)
Wikidata
Q17227904 →

Tower & Structure

Tower Height
50m
Tower Shape
cylindrical
Tower Color
gray concrete
Material
concrete

Structure: round cylindrical concrete tower with a round skeletal tower and two galleries supporting various equipment at the top

Location

City
Osaka
Country
🇯🇵Japan
Region
Osaka Prefecture
Sea Region
southeast corner of a large artificial island being created between the north and south harbors of Ōsaka
Latitude
34.6435°
Longitude
135.3791°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Ōsaka Lighthouse be seen?+
With a focal height of 52 meters and a nominal range of 19 nautical miles (approximately 35.2 km), Ōsaka is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Ōsaka Lighthouse at night?+
Ōsaka 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 Ōsaka Lighthouse guide vessels into?+
Ōsaka Lighthouse assists vessels approaching 5 nearby ports. The closest is Osaka, Tottori at 2.7 NM to the E. Other ports served include Amagasaki (3.4 NM N), Nishinomiya (3.4 NM N), AmagasakiNishinomiyaAshiya (4.8 NM NNE), Osaka (6.1 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōsaka Lighthouse still active and maintained?+
Yes, Ōsaka 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 Ōsaka Lighthouse?+
Ōsaka 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 Ōsaka Lighthouse?+
You can track vessels near Ōsaka 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.