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Inubosaki Lighthouse

Fl W 15s🇯🇵Honshu-East Coast, JPOperational

Location & Light Range

About Inubosaki Lighthouse

Also known as: Inubōsaki Lighthouse

Standing 52 meters above sea level on the eastern coast of Honshu, Inubosaki Lighthouse emits a white light that flashes once every 15 seconds. This light can be seen for 19 nautical miles. The lighthouse is situated within the Suigo-Tsukuba Quasi-National Park. Its construction dates are not specified, but it has been recognized for its significance through various designations. The structure itself is a testament to maritime engineering and serves as a key navigational point.

Why it matters: Inubosaki Lighthouse is recognized as one of the world's 100 lighthouses and one of Japan's 50 lighthouses. It was designated a registered tangible cultural property in 2010 and a national important cultural property in 2020.

Light & Optic

Characteristic Signature
Fl W 15s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
15s
Raw Code
Fl.W. period 15s
Focal Height
52m
Light Range
19NM (35.2 km)
Geographic Range
19NM

References & Identifiers

Admiralty No.
M6478
NGA No.
4780
Wikipedia
Read on Wikipedia →
Wikidata
Q6059232 →
OpenStreetMap
View on OSM →

Location

City
Honshu-East Coast
Country
🇯🇵JP
Latitude
35.7078°
Longitude
140.8685°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Inubosaki Lighthouse be seen?+
With a focal height of 52 meters and a nominal range of 19 nautical miles (approximately 35.2 km), Inubosaki is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Inubosaki Lighthouse at night?+
Inubosaki displays the characteristic Fl W 15s — 1 white flash every 15 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.
Which ports and harbors does Inubosaki Lighthouse guide vessels into?+
Inubosaki Lighthouse assists vessels approaching 5 nearby ports. The closest is Naarai at 1.8 NM to the NNW. Other ports served include Takada (1.8 NM NNW), Choshi (2.5 NM NNW), Kashima, Ibaraki (15.1 NM NW), Futtsu, Chiba (24.8 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Inubosaki Lighthouse still active and maintained?+
Yes, Inubosaki 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 Inubosaki Lighthouse?+
Inubosaki 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 Inubosaki Lighthouse?+
You can track vessels near Inubosaki 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.