The soul food of Yamagata, the top consuming region of konjac in JapanTama-konnyaku, or konjac balls, is a Yamagata favorite and soul food of the people. When sightseeing or attending an event in Yamagata, people often find themselves searching for a konjac ball street vendor. Stuff a hot konjac ball in your mouth with a dab of karashi mustard for a scrumptious treat!