Inubōsaki Lighthouse
Inubōsaki Lighthouse (犬吠埼燈台, Inubōsaki tōdai) is a lighthouse on Cape Inubō, in the city of Chōshi, Chiba Prefecture Japan. It is notable as one of the few lighthouses whose original lens was a first order Fresnel lens, the strongest type of Fresnel lens. It is a Registered Tangible Cultural Property of Japan. The lighthouse is located within the borders of the Suigo-Tsukuba Quasi-National Park.
Inubōsaki Lighthouse | |
| Location | Cape Inubō Chōshi, Chiba Japan |
|---|---|
| Coordinates | 35°42′28.3″N 140°52′07.1″E |
| Tower | |
| Constructed | November 15, 1874 |
| Construction | brick tower |
| Height | 31.3 metres (103 ft) |
| Shape | cylindrical tower with balcony and lantern attached to 1-story keeper's house |
| Markings | white tower and lantern |
| Heritage | Important Cultural Property |
| Light | |
| First lit | 15 November 1874 |
| Focal height | 51.8 metres (170 ft) |
| Lens | First order Fresnel |
| Intensity | 2,000,000 candela |
| Range | 19.5 nautical miles (36.1 km; 22.4 mi) |
| Characteristic | Fl W 15s |
| Japan no. | JCG-1869 |
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