Restaurant Dewaya, Nishikawa Town, Yamagata Prefecture (I'm sorry I can't read the address on their Japanese card, but their website is www.dewaya.com).
A Japanese chef friend in New York told me about Dewaya, a restaurant located at the foot of Mount Gasson, a holy pilgrimage destination in the Tohoku region's Yamagata Prefecture. It started 80 years ago as a rural lodge for pilgrims, but became famous for its cuisine based solely on uncultivated vegetables when one day, as the story goes, the lodge ran out of food and had to serve the pilgrims local wild greens picked from the mountains. The response was enthusiastic. A celebrated "sansai" (wild vegetable) restaurant was born.
I was extremely fortunate to have been joined by the gracious Vice Governor Gotoh-san, her assistant Sato-san, and an English professor named Simon Reeves - who all pitched in to help translate. (Thank you again!)
We met the second-generation chef and owner in the restaurant's "kura," or traditional warehouse, a two-story rectangular box built with thick packed-earth walls. This one had been converted into a private dining room. His assistant soon arrived with two bamboo trays filled with raw ingredients, and the chef - a man passionate about his wild greens - launched into a spirited explanation.