Where Japan's forests and farmland meet, a way of life is under threat

MINAMI-UONUMA, Japan -- Chef Keiko Kuwakino is on a mission. She is preparing dinner for 20 guests at Sanaburi, her Michelin-starred restaurant at the luxury retreat Satoyama Jujo in rural Niigata prefecture, but she is short on udo (Japanese spikenard), a slightly bitter spring wild vegetable she has gathered for the menu.