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Ishima Lighthouse

Fl W 10s🇯🇵Seto Naikai Eastern - Kii Suido, JPInactive

Location & Light Range

About Ishima Lighthouse

The Ishima lighthouse is a red, square concrete tower that stands 144 meters above sea level. Its light emits a single white flash every 10 seconds. The structure also features a topmark. It was originally listed with a geographic range of 23 nautical miles.

Light & Optic

Characteristic Signature
Fl W 10s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
10s
Raw Code
Fl.W. period 10s
Focal Height
144m
Light Range
23NM (42.6 km)
Geographic Range
23NM

Location

City
Seto Naikai Eastern - Kii Suido
Country
🇯🇵JP
Latitude
33.8448°
Longitude
134.8147°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
square
Tower Color
red
Material
concrete

Structure: PORT (IALA A) Red beacon, topmark

References & Identifiers

Admiralty No.
M5576
NGA No.
7044
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Frequently Asked Questions

How far offshore can Ishima Lighthouse be seen?+
With a focal height of 144 meters and a nominal range of 23 nautical miles (approximately 42.6 km), Ishima 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 Ishima Lighthouse at night?+
Ishima displays the characteristic Fl W 10s — 1 white flash every 10 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 Ishima Lighthouse guide vessels into?+
Ishima Lighthouse assists vessels approaching 5 nearby ports. The closest is Anan at 7.5 NM to the W. Other ports served include Tachibana (8.1 NM WNW), Tomioka, Tokushima (8.4 NM NW), Yuki (11.9 NM WSW), Yuki (12.3 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ishima Lighthouse still active and maintained?+
Ishima Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
What shipping routes pass near Ishima Lighthouse?+
Ishima 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 Ishima Lighthouse?+
You can track vessels near Ishima 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.