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Reidai Bridge is a stone single-arch bridge spanning the Midori River in Misato Town, Kumamoto Prefecture. Completed during the late Edo period (the Koka era), it is currently designated as a National Important Cultural Property. Boasting a total length of 89.86m and a height of 16.32m, it features one of the largest arch spans (28.3m) among stone bridges completed before the Meiji era. While it once served as a vital transportation route, automobile traffic is now prohibited, and it is open as a pedestrian bridge for tourists. Its presence within the lush, deep valley showcases the pinnacle of traditional Japanese stone-building craftsmanship.
The bridge was built in a location that was once part of the 'Hyuga Okan' highway and a deep valley known as Funatsukyo. Historically, this area was a difficult passage due to the fast-flowing river, making boat crossings dangerous during high water levels. Although wooden bridges existed since the mid-E_do period, they were frequently destroyed by floods. Consequently, a local leader named Shinohara Zenbei planned the construction of this stone bridge. Construction began in 1846 (the 3rd year of the Koka era) and was completed the following year. The project was a massive undertaking, involving over 40,000 people, including 72 skilled stonemasons led by the master mason Uzusuke, as well as local farmers.
The name 'Reidai' is derived from a classical Chinese story from the 'Mencius,' which mentions the construction of a 'Reidai' (spiritual platform) by King Wen. The name was chosen to celebrate the fact that the construction was completed ahead of schedule. During the Meiji era, the stone walls were reinforced to allow larger vehicles, but in 1966, automobile traffic was banned following the completion of a new steel bridge nearby. In 1980, restoration work was carried out to return the bridge to its original appearance.
The greatest attraction is the aesthetic beauty of the massive stone arch spanning the deep Midori River valley. Each precisely fitted stone block conveys a sense of strength, having withstood the forces of nature for over 160 years. The harmony between the historical architecture and the surrounding lush greenery makes it an ideal spot for photography. Nearby, you can also find traces of the past, such as the remains of a tunnel from the former Naidai-shin Forest Railway, offering a glimpse into the area's industrial history.
Reidai Bridge is a place to be enjoyed alongside the natural environment. While beautiful year-round, the contrast between the white stone bridge and the vibrant green foliage is particularly stunning during the lush seasons or when water levels are stable. Visiting during bright daylight hours is recommended to appreciate the intricate texture and precise masonry of the stones. The area is well-equipped with parking lots and observation points for a relaxing visit.
The main activity here is a 'historical stroll.' Walking across the bridge allows you to experience firsthand how people once navigated this challenging terrain. With nearby parking and viewpoints, it is also a perfect spot to stop during a drive to refresh your mind while admiring the scenery. It is a wonderful way to feel the greatness of traditional Japanese civil engineering.
The Misato area is rich in stone bridge culture. Nearby, you can find other important cultural properties such as 'Futamata Bridge' and 'Mamondo Bridge.' Additionally, the nearby Yamato Town is home to the National Treasure 'Tsuyunobashi.' This entire region is a fantastic destination for travelers interested in a route themed around history and nature.
As the bridge is located in a natural valley, we recommend wearing comfortable walking shoes. While the bridge is accessible for pedestrians, please respect the environment by not littering or picking plants.