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Tokuyama Lighthouse

Iso G 4s🇯🇵Yamaguchi, JPOperational

Location & Light Range

About Tokuyama Lighthouse

This concrete lighthouse stands 16 meters tall and has a focal height of 13 meters. The structure consists of a white fiberglass building situated atop a concrete column. Its round tower is painted white. The light emitted is green, flashing once every 3 seconds. The geographic range of the light is 5 nautical miles.

Light & Optic

Characteristic Signature
Iso G 4s
Flash Type
Isophase
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Fl.G. period 3s
Focal Height
13m
Geographic Range
5NM

Location

City
Yamaguchi
Country
🇯🇵JP
Latitude
34.0496°
Longitude
131.7963°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
16m
Tower Shape
round
Tower Color
white
Material
concrete

Structure: White glass reinforced plastic(grp) fiberglass building, concrete column; 16

References & Identifiers

Admiralty No.
M5404
NGA No.
9536
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Frequently Asked Questions

How do mariners identify Tokuyama Lighthouse at night?+
Tokuyama 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 Tokuyama Lighthouse guide vessels into?+
Tokuyama Lighthouse assists vessels approaching 5 nearby ports. The closest is Tokuyamakudamatsu at 1.1 NM to the W. Other ports served include Tokuyama (1.4 NM SE), Tonda (2.5 NM WSW), Kudamatsu (3.8 NM SE), Hikari (8.5 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tokuyama Lighthouse still active and maintained?+
Yes, Tokuyama 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 Tokuyama Lighthouse?+
Tokuyama 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 Tokuyama Lighthouse?+
You can track vessels near Tokuyama 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.