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Sashima Lighthouse

Fl Green 3s🇯🇵Yokosuka, JPOperational

Location & Light Range

About Sashima Lighthouse

Also known as: Sashima (Sajima) Kō Entrance (Naka Se)

The Sashima Lighthouse is a white, masonry mast structure standing 39 meters tall. Its focal plane is 13 meters above sea level, casting a green light that flashes once every 3 seconds. The light is visible for 11.3 nautical miles and is operational. Built of masonry, the tower is 39 meters high. The lighthouse is visible from 158° to 300°. The site is open to the public, but the tower itself is closed.

Why it matters: This lighthouse marks the entrance to a busy shipping lane and warns vessels about the Naka Se, a navigational hazard.

Light & Optic

Characteristic Signature
Fl Green 3s
Flash Type
Flashing
Light Color
Green
Interval
3s
Raw Code
Fl G 3s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Yokosuka
Country
🇯🇵Japan
Region
Kanagawa Prefecture
Latitude
35.2171°
Longitude
139.6082°

References & Identifiers

Nearest Port
Misaki, Kanagawa(4.7 km)
Admiralty No.
M6340
NGA No.
5396

Tower & Structure

Tower Height
39m
Tower Shape
mast
Tower Color
white
Material
masonry

Structure: White masonry tower; 39. Visible 158°-300°. Disused signal station Fl R (occasional) light on mast 7.5M WSW

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Sashima Lighthouse at night?+
Sashima displays the characteristic Fl Green 3s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Sashima Lighthouse guide vessels into?+
Sashima Lighthouse assists vessels approaching 5 nearby ports. The closest is Zushi at 4.2 NM to the NNW. Other ports served include Hayama (4.9 NM NE), Oppama (5 NM N), Hamakanaya (5.4 NM E), Kurihama (5.5 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sashima Lighthouse still active and maintained?+
Yes, Sashima 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 Sashima Lighthouse?+
Sashima 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 Sashima Lighthouse?+
You can track vessels near Sashima 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.