The Shiranai Clan (知らない一族, Shiranai no Ichizoku) was a powerful ninja clan of Sunagakure, holder of a Kekkei Tōtta: the Coal Release. Since the founding of Sunagakure, the Shinarai clan was allied of the First Kazekage. Due to an exchange of favors and some enemies of Sunagakure eliminated for alleged "tamers of coal," the clan managed to settle in the rich mines of the Land of Wind in the west part of Sunagakure. Over the years, the Shinarai clan's ninja specialize in techniques of mining and smelting the coal. During the technological revolution in Sunagakure, the Shinarai clan's ninja were who created the first steam-powered locomotive, carrying people from the border with the Land of Rivers to the Land of Stone.