The Mōri clan was a prominent samurai family in Japan during the late Edo period and the Sengoku period. They were known for their significant role in the western part of Japan, particularly in Chūgoku region. The clan's power peaked in the 16th century under the leadership of Mōri Motonari, who expanded their territory and influence through strategic alliances and military prowess. The Mōri clan ruled over the Bitchū Province and established their base at Okayama Castle. They were known for their naval strength and played a crucial role in various conflicts, including the Battle of Sekigahara. The clan's legacy continues to be remembered in Japanese history and culture.