The Iya Valley region is a scenic area known for its dramatic mountain valleys and old vine bridges.
Situated in the western part of Tokushima and nearly in the center of Shikoku, the Iya area is one of the large "hidden mountain regions" in Japan.
Although access has improved in recent years, the Iya Valley and the inner parts of Shikoku have historically been remote and difficult to enter.
In modern times, the Iya Valley has become an increasingly popular tourist destination.
Deep in the bosom of Mt. Tsurugi-san, the second tallest mountain in Shikoku, the region is surrounded by mountains in the Shikoku Mountain district, with a deep valley formed among the mountains cut through by the Iya-gawa River, a tributary of the Yoshino-gawa River.
The vine bridge over the Iya-gawa River, called "Iya-no-Kazura-bashi," is a 45 meter-long and 2 meter-wide suspension bridge with a height of 14 meters from the water level.
Designated a national important folkloric property as one of Japan's three rare bridges, the bridge is rebuilt every three years.