In this period, the Ouchi family became the greatest daimyo in the Sengoku period in Saigoku (western part of Japan [esp. Kyushu, but ranging as far east as Kinki]) both in name and in reality, along with its territories, such as Suo Province, Nagato Province, Iwami Province, Aki Province, Bingo Province, Buzen Province and Chikuzen Province, and the family reached its height.
この時代には周防をはじめ、長門国・石見国・安芸国・備後国・豊前国・筑前国を領するなど、名実共に西国随一の戦国大名となり、大内家は全盛期を迎えた。