Complex sentence: Izumo (出雲国;-no kuni) was an old province of Japan which today consists of the eastern part of Shimane prefecture of the Chugoku region.
Split into simpler sentences: Izumo (出雲国;-no kuni) was an old province of Japan. It was the region of situated ancient Japan in puts into effect them in Shimane prefecture of the Chugoku region.