The Cedar Avenue of Nikko, in the city of Nikko in Japan, stretches for 37 km and lined on either side by some 13,000 cedar trees, known as Sugi. The street is listed in "The Guinness Book of World Records" as the longest tree-lined avenue in the world, and was created almost 400 years ago.

The trees were planted over a period of 20 years beginning in 1625 as an approach to Nikko’s Toshogu Shrine by Matsudaira Masatsuna, a feudal lord serving Tokugawa Ieyasu. After Tokugawa Ieyasu death in 1616, Masatsuna Matsudaira undertook the construction of Nikko Toshogu shrine, and he began to plant Japanese cedar trees along the main roads leading to Nikko. It is estimated that some 200,000 cedars were planted on this occasion. Large-scale felling for road construction and the relentless exposure to vehicle exhaust has damaged the trees reducing their numbers to just 13,000 today.

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