The other main area which interested Uesugi Kenshin was Etchū Province in the west, and Kenshin would spend nearly half his life involved in the politics of that province. The land was inhabited by two feuding clans, the Jinbo and the Shiina clan. Kenshin first entered the dispute as a mediator in the early 1550s between rivals Shiina Yasutane and Jinbo Nagamoto, but he later sided with the Shiina and took over the Jinbo clan. Decades later, Kenshin turned against the Shiina clan, taking their main castle in 1575 and having Shiina Yasutane assassinated in 1576 by Kojima Motoshige.