The bridges were historically designed to be easily cut down by residents to prevent enemies from crossing into the valley.
Modern safety measures include wire cables hidden within the woven vines to prevent structural failure.
The current bridge is reconstructed on a triennial cycle to maintain the traditional aesthetic while ensuring safety.
This bridge is designated as an Important Tangible Folk Cultural Property of Japan.
The bridge sways significantly underfoot due to the flexible nature of the vine material.
The Iya Valley Vine Bridge, known as Iya-no-Kazurabashi, is a traditional suspension bridge constructed from hardy actinidia (kiwi) vines spanning the Iya River. Stretching 45 meters in length and suspended 14 meters above the water, the bridge serves as a primary historical landmark of the remote Iya Valley in Tokushima Prefecture. The structure requires active maintenance, with the vines being replaced every three years to ensure structural integrity. It is one of three remaining vine bridges in the region, reflecting ancient techniques used by the Heike clan for defense. Visitors cross the bridge by walking on wooden slats spaced with significant gaps, offering a view of the river flowing beneath their feet. The site is located in a deep, mountainous gorge characterized by steep slopes and dense foliage.
The viewing area on the riverbank directly across from the bridge entrance provides the best perspective of the structure against the gorge.
Wear secure, flat-soled footwear to manage the uneven and gapped wooden slats.
Cross with a steady pace and avoid stopping in the middle, as the bridge is narrow and prone to swaying.
Visit during the early morning to avoid the largest crowds from tourist bus groups.
Avoid wearing loose sandals or flip-flops, as they are difficult to keep on while navigating the gaps in the wooden planks.
Maintain a steady flow of traffic; do not run or jump on the bridge.
