The Mogami River is one of the most important waterways in northern Japan. It runs for 229 kilometers through Yamagata Prefecture, with around 80% of the prefecture's population living along its basin. From the 17th century, the river became a major transportation route, carrying people and cargo such as rice and safflower down to the coast, and from there as far as Kyoto and Osaka Prefecture. To this day, many towns along the river retain traces of their historic streetscapes and culture. In this episode, Catrina Sugita from Switzerland visits a community close to the Mogami River. She meets people who are keeping alive local traditions for surviving through the harsh, snowbound winter months. And she discovers the charm and bounty of this waterway known to the locals simply as their "Mother River."