Seiyo City borders cities and towns in Ehime Prefecture, such as Ozu City and Yawatahama City, and towns in Kochi Prefecture. Yawatahama City's official tree is the beech, its official flower is the Chinese milkweed, and the city has also designated other city symbols. The city's three symbols are a bird, a fish, and an insect: the Japanese bush warbler, the horse mackerel, and the firefly, respectively. The city is located in the Uwa Basin and is also home to mountains over 1,000 meters above sea level. The city's climate varies from region to region, with some areas experiencing heavy snowfall in winter and others experiencing warmer temperatures. Famous attractions in the city include Umonzan Ryutakuji Temple and Onogahara Karst Ranch.