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Heda Kō Lighthouse

Iso White 6s🇯🇵Numazu, JPOperational

Location & Light Range

About Heda Kō Lighthouse

The Heda Kō lighthouse, built in 1952, is a two-stage, round cylindrical concrete tower, painted white. The structure measures 12 meters in height, with the lamp set 17 meters above sea level. Its light produces an isophase white flash every 6 seconds, with a range of 12.4 nautical miles. Located at the entry to Heda harbor in Shizuoka Prefecture, Japan, it is about 0.4 km from the nearest port. Visitors may access the grounds, but the tower is not open.

Why it matters: This navigation aid marks the entrance to Heda harbor, assisting local fishing vessels and commercial ships along the coast.

Light & Optic

Characteristic Signature
Iso White 6s
Flash Type
Isophase
Light Color
White
Interval
6s
Raw Code
Iso W 6s
Focal Height
17m
Geographic Range
12.4NM

Construction & History

Year Built
1952

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: two-stage round cylindrical concrete tower, painted white

Location

City
Numazu
Country
🇯🇵Japan
Region
Shizuoka Prefecture
Sea Region
entrance to the harbor of Heda, about 7 km (4.5 mi) north of Toi
Latitude
34.9756°
Longitude
138.7639°

References & Identifiers

Nearest Port
Heda(0.4 km)
ARLHS No.
JPN-099
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Frequently Asked Questions

How do mariners identify Heda Kō Lighthouse at night?+
Heda Kō displays the characteristic Iso White 6s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Heda Kō Lighthouse guide vessels into?+
Heda Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Heda at 0.3 NM to the E. Other ports served include Toi (3.9 NM SSE), Omosu (6.6 NM ENE), Ugusu (7.5 NM S), Numazu (7.8 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Heda Kō Lighthouse still active and maintained?+
Yes, Heda Kō 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 Heda Kō Lighthouse?+
Heda Kō 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 Heda Kō Lighthouse?+
You can track vessels near Heda Kō 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.