Amid the decline of many of Japan's rural communities, the hot springs village resort of Kurokawa Onsen is a rare, bright spot. Its two dozen traditional inns, or ryokan, draw nearly a million tourists a year eager to admire its landscape, experience its hospitality, and soak in its hot springs. As a result, these ryokan have enticed village youth to return home to take over successful family businesses and revive the community. Chris McMorran...