Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Syonan Lighthouse

Iso G 4s🇯🇵Tōkyō Area, JPOperational

Location & Light Range

About Syonan Lighthouse

Also known as: Shōnan Port Lighthouse

This navigational aid stands on the outer end of the breakwater at Shonan Port in Fujisawa City, Kanagawa Prefecture. The metal structure is a round column, painted in alternating black and yellow bands. It emits a green isophase light, with a 4-second cycle. The focal height reaches 19 meters, providing a geographic range of 8 nautical miles. An Automatic Identification System (AIS) is also integrated into the structure.

Light & Optic

Characteristic Signature
Iso G 4s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Iso.G. period 4s
Focal Height
19m
Geographic Range
8NM

Location

City
Tōkyō Area
Country
🇯🇵JP
Latitude
35.2990°
Longitude
139.4880°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
round
Tower Color
black and yellow
Material
metal

Structure: E. CARDINAL (IALA A) Black metal column, yellow banded. AIS (MMSI No 995121034)

References & Identifiers

Admiralty No.
M6333
NGA No.
5400
Wikipedia
Read on Wikipedia →
Wikidata
Q11563345 →
OpenStreetMap
View on OSM →
Live tracking · 50,000+ mariners

Find Syonan Lighthouse on the live nautical map

Plan voyages near JP, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Syonan Lighthouse at night?+
Syonan displays the characteristic Iso G 4s — 1 green flash every 4 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Syonan Lighthouse guide vessels into?+
Syonan Lighthouse assists vessels approaching 5 nearby ports. The closest is Shonan at 0.3 NM to the N. Other ports served include Chigasaki (4.5 NM WNW), Zushi (4.8 NM ESE), Hiratsuka (6.1 NM W), Oppama (6.3 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Syonan Lighthouse still active and maintained?+
Yes, Syonan 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 Syonan Lighthouse?+
Syonan 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 Syonan Lighthouse?+
You can track vessels near Syonan 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.