Jōgashima Lighthouse Explained

Jōgashima Lighthouse
(城ヶ島灯台)
Location:Miura
Kanagawa Prefecture
Japan
Coordinates:35.1351°N 139.6111°W
Yearbuilt:1870 (first)
Yearlit:1925 (current)
Automated:yes
Foundation:concrete base
Construction:concrete tower
Shape:cylindrical tower with balcony and lantern
Marking:white tower and lantern
Height:11.5m (37.7feet)
Focalheight:30.1m (98.8feet)
Lens:4th order Fresnel
Intensity:400,000 candela
Range:[1]
Characteristic:Fl W 15s
Country:Japan
Countrynumber:JCG-2407

is a lighthouse located on the island of Jōgashima in the city of Miura, Kanagawa Prefecture, Japan, off the southernmost and western tip of Miura Peninsula, facing Sagami Bay. It is the fourth oldest western style lighthouse to be built in Japan, and the second oldest surviving to the present day.

History

The Jōgashima Lighthouse was one of eight lighthouses built in Japan under the provisions of the Anglo-Japanese Treaty of Amity and Commerce of 1858, signed by the Bakumatsu period Tokugawa Shogunate. The lighthouse was designed and constructed by expatriate French engineer Léonce Verny. Verny constructed another three lighthouses around Tokyo Bay, and was also the engineer who built the nearby Yokosuka Naval Arsenal during his career in Japan.

The Jōgashima Lighthouse was completed on September 8, 1870, after the Meiji Restoration, and was originally built of brick. The original structure was destroyed during the Great Kantō earthquake on September 1, 1923, and was replaced with the current reinforced-concrete round structure on August 1, 1925. In 1928, its light source was changed from acetylene to electric, greatly increasing its visibility. The lighthouse has been unmanned since 1991. It is currently maintained by the Japan Coast Guard.

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Notes and References

  1. http://yamatae.sakura.ne.jp/Lh3/joga.html Lighthouses in Japan