Tokiwa Ohashi Bridge crosses over the Nakagawa River in Kamo-gun, Shizuoka Pref. The railings with a length of 30 m are decorated with Namako-kabe (sea slug walls). At the end of the railings are the pictures of swallows and cherry trees, which are drawn with plaster. Namako-kabe is made of flat tiles with white plaster used to seal the joints. The plaster is so thickly applied that the wall is very strong against wind, rain and fire. The rounded lines of the plaster look like sea slugs, so it supplies the name. This technique has been used in a lot of buildings in this area since the ancient times. The construction of the bridge was completed in 1985. It was designed by Osamu Ishiyama, who is known for designing Chohachi Museum of plaster art in Izu Peninsula. In the vicinity of the bridge are classic streets, along which stand a lot of buildings with Namako-kabe walls including Nakase Residence, the preserved shop and residence of a dealer in kimono fabrics in the Meiji period.