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Nobusi Kō Lighthouse

Iso R 4s🇯🇵Izu and Ogasawara Islands, JPOperational

Location & Light Range

About Nobusi Kō Lighthouse

The Nobusi Kō Lighthouse is a red, round concrete tower that stands 36 meters high. Its focal plane is 14 meters above sea level. The light emits a red flash on a 4-second cycle, characterized as an isophase light. This distinctive illumination offers a geographic range of 8 nautical miles.

Light & Optic

Characteristic Signature
Iso R 4s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
4s
Raw Code
Iso.R. period 4s
Focal Height
14m
Geographic Range
8NM

Location

City
Izu and Ogasawara Islands
Country
🇯🇵JP
Latitude
34.3343°
Longitude
139.2163°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
36m
Tower Shape
round
Tower Color
red
Material
concrete

Structure: Red round concrete tower; 36

References & Identifiers

Admiralty No.
M6272.8
NGA No.
5562
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Frequently Asked Questions

How do mariners identify Nobusi Kō Lighthouse at night?+
Nobusi Kō displays the characteristic Iso R 4s — 1 red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Nobusi Kō Lighthouse guide vessels into?+
Nobusi Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Toshima/Tokyo at 11.2 NM to the NNE. Other ports served include Shimoda, Shizuoka (23.8 NM NNW), Inatori (27.7 NM NNW), Nishitokyo (28.6 NM NNE), Okada (28.7 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Nobusi Kō Lighthouse still active and maintained?+
Yes, Nobusi 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 Nobusi Kō Lighthouse?+
Nobusi 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 Nobusi Kō Lighthouse?+
You can track vessels near Nobusi 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.