Miso is a seasoning born of a fermentation process using various bacteria. It's used to make miso soup, a Japanese soul food essential to daily dining. While miso is produced all over Japan, we go to rice-producing Yamagata Prefecture to check out a traditional production method using giant, 100-year-old barrels. A visit to a Zen temple reveals the deep connection between miso and Zen training. In the ancient capital of Kamakura, we introduce inventive dishes that breathe new life into miso.