Arima Onsen is one of Japan’s oldest hot spring towns, known for its mineral-rich “Kinsen” and “Ginsen” waters and its long healing tradition. Key spots include Tenjin Sengen, the spring linked to Arima’s origins, and Tansan Sengen, the carbonated source behind the local tansan senbei. You can also visit Taiko’s Yudonokan, which explains Toyotomi Hideyoshi’s role in developing Arima, and Onsenji Temple, a historic site for healing prayers. The town’s streets offer a warm glimpse of local culture, highlighted by freshly baked nama tansan senbei available only here.