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Ya Shima Lighthouse

Fl White 10s🇯🇵Kaminoseki, JPOperational

Location & Light Range

About Ya Shima Lighthouse

This concrete lighthouse, first lit in 1909, is a cylindrical tower standing 11.5 meters tall. It is situated on a steep slope at the southern end of Ya Shima, the southernmost island of the Bōyo Islands group. The light is positioned 61 meters above sea level and emits a single white flash every 10 seconds, visible for over 20 nautical miles. The tower, painted white, features a lantern and gallery and is constructed from concrete. The lighthouse remains operational, guiding vessels navigating the waters of the Inland Sea.

Why it matters: This light is indispensable for east-west ship traffic traversing the Inland Sea, marking the southernmost island of the Bōyo Islands.

Light & Optic

Characteristic Signature
Fl White 10s
Flash Type
Flashing
Light Color
White
Interval
10s
Raw Code
Fl W 10s
Focal Height
61m
Geographic Range
20.2NM

Construction & History

First Lit
1909

References & Identifiers

Nearest Port
Murotsu, Yamaguchi(7.5 km)
Admiralty No.
M5414
ARLHS No.
JPN-742

Tower & Structure

Tower Height
11.5m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round concrete tower with lantern and gallery

Location

City
Kaminoseki
Country
🇯🇵Japan
Region
Yamaguchi Prefecture
Sea Region
Ya Shima is the southernmost island of the Bōyo (Hōyo) Islands, a group that includes Suō-Ōshima. It is located on a steep slope at the southern end of the island, marking a critical point for east-west ship traffic in the Inland Sea.
Latitude
33.7136°
Longitude
132.1341°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ya Shima Lighthouse at night?+
Ya Shima displays the characteristic Fl White 10s. 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 Ya Shima Lighthouse guide vessels into?+
Ya Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Hirao at 14.2 NM to the N. Other ports served include Yanai (14.2 NM N), Kuka (15.7 NM NNE), MITSUKE (16.4 NM SSE), Ikata (17.7 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ya Shima Lighthouse still active and maintained?+
Yes, Ya Shima 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 Ya Shima Lighthouse?+
Ya Shima 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 Ya Shima Lighthouse?+
You can track vessels near Ya Shima 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.