"Mousou-jiru" bamboo shoot soup. One of many dishes made with local mountain vegetables served at the Omoya Guesthouse. Tsuruoka, Yamagata Prefecture, Japan, April 10, 2016. The city of Tsuruoka in Yamagata Prefecture is famous for its sansai mountain vegetable cuisine. These foraged grasses, fungi and vegetables are also used by the mountain ascetics of the Shugendo religion.