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Aji-shiraishisho Lighthouse

F W 4s🇯🇵Seto Naikai Eastern, JPOperational

Location & Light Range

About Aji-shiraishisho Lighthouse

This white, round masonry tower stands 85 meters tall. The focal height of the light is 58 meters. It emits a single red flash on a 4-second cycle. The lighthouse is operational and its structure includes a lantern.

Why it matters: This lighthouse is part of the Seto Naikai Eastern waterway.

Light & Optic

Characteristic Signature
F W 4s
Flash Type
Fixed
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Iso.R. period 4s
Focal Height
58m
Geographic Range
5NM

Location

City
Seto Naikai Eastern
Country
🇯🇵JP
Latitude
34.3952°
Longitude
134.1206°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
85m
Tower Shape
round
Tower Color
white
Material
masonry

Structure: White round masonry tower, and lantern; 85

References & Identifiers

Admiralty No.
M5545
NGA No.
8136
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Frequently Asked Questions

How do mariners identify Aji-shiraishisho Lighthouse at night?+
Aji-shiraishisho displays the characteristic F W 4s — 1 white flash every 4 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.
Which ports and harbors does Aji-shiraishisho Lighthouse guide vessels into?+
Aji-shiraishisho Lighthouse assists vessels approaching 5 nearby ports. The closest is Takamatsu at 4.3 NM to the WSW. Other ports served include Tonosho (6 NM NNE), Ieura (6.5 NM NNW), Ikeda, Kagawa (7.1 NM NE), Naoshima (7.8 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Aji-shiraishisho Lighthouse still active and maintained?+
Yes, Aji-shiraishisho 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 Aji-shiraishisho Lighthouse?+
Aji-shiraishisho 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 Aji-shiraishisho Lighthouse?+
You can track vessels near Aji-shiraishisho 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.