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Mu Shima Lighthouse

Fl White 6s🇯🇵Kasaoka, JPOperational

Location & Light Range

About Mu Shima Lighthouse

Also known as: Mu Shima (Mushima)

Mu Shima Lighthouse, built in 1922, is a white, cylindrical concrete tower rising 13 meters from a one-story keeper's house. It is situated on an island about 6 kilometers northwest of Hako Saki on Shikoku, marking the eastern entrance to Hiiuchi Bay. The lighthouse emits a single white flash every six seconds from a focal height of 70 meters, with a geographic range of 21.4 nautical miles. Access to the island is solely by boat, highlighting its somewhat remote location. This structure guides vessels through a significant section of the Inland Sea.

Why it matters: This lighthouse aids navigation for vessels entering Hiiuchi Bay from the east, a busier part of the Inland Sea. Its integrated tower and keeper's house design presents an interesting architectural example.

Light & Optic

Characteristic Signature
Fl White 6s
Flash Type
Flashing
Light Color
White
Interval
6s
Raw Code
Fl W 6s
Focal Height
70m
Geographic Range
21.4NM

Construction & History

Year Built
1922

References & Identifiers

Nearest Port
Hakoura(3.8 km)
Admiralty No.
M5500
ARLHS No.
JPN-375

Tower & Structure

Tower Height
13m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery, rising from a 1-story concrete keeper's house

Location

City
Kasaoka
Country
🇯🇵Japan
Region
Okayama Prefecture
Sea Region
eastern entrance to Hiiuchi Bay, one of the wider sections of the Inland Sea. Located on an island about 6 km (3.5 mi) northwest of Hako Saki on Shikoku.
Latitude
34.2999°
Longitude
133.5338°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Mu Shima Lighthouse at night?+
Mu Shima displays the characteristic Fl White 6s. 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 Mu Shima Lighthouse guide vessels into?+
Mu Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Sanagi at 5.2 NM to the ENE. Other ports served include Awashima (5.4 NM ESE), Ohama, Ehime (5.4 NM SE), Nio (7.9 NM SE), Takuma (7.9 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Mu Shima Lighthouse still active and maintained?+
Yes, Mu 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 Mu Shima Lighthouse?+
Mu 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 Mu Shima Lighthouse?+
You can track vessels near Mu 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.