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Shiina Ko Lighthouse

Iso R 6s🇯🇵Shikoku-South coast, JPInactive

Location & Light Range

About Shiina Ko Lighthouse

This red tower, standing 36 meters high, has a focal height of 15 meters. Its light displays an isophase red pattern on a 6-second cycle. The geographic range for this aid is 4 nautical miles. The structure is painted red.

Light & Optic

Characteristic Signature
Iso R 6s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
6s
Raw Code
Iso.R. period 6s
Focal Height
15m
Light Range
4NM (7.4 km)
Geographic Range
4NM

Location

City
Shikoku-South coast
Country
🇯🇵JP
Latitude
33.3270°
Longitude
134.1984°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
36m
Tower Color
red

Structure: Red tower; 36

References & Identifiers

Admiralty No.
M5585.7
NGA No.
10080
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Frequently Asked Questions

How far offshore can Shiina Ko Lighthouse be seen?+
With a focal height of 15 meters and a nominal range of 4 nautical miles (approximately 7.4 km), Shiina Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Shiina Ko Lighthouse at night?+
Shiina Ko displays the characteristic Iso R 6s — 1 red flash every 6 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. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Shiina Ko Lighthouse guide vessels into?+
Shiina Ko Lighthouse assists vessels approaching 5 nearby ports. The closest is Murotsu, Kochi at 3.7 NM to the SW. Other ports served include Nahari (10.7 NM WNW), Kannoura (14 NM NNE), Asakawa (20.1 NM NNE), Hiwasa (29.9 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Shiina Ko Lighthouse still active and maintained?+
Shiina Ko 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 Shiina Ko Lighthouse?+
Shiina Ko 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 Shiina Ko Lighthouse?+
You can track vessels near Shiina Ko 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.