Complex sentence: Afterwards, Yoshiaki sought and received protection from the Mori clan in western Japan and later was requested by Toyotomi Hideyoshi to accept him as an adopted son and 16th Ashikaga Shogun but Yoshiaki refused.
Split into simpler sentences: Afterwards, Yoshiaki sought and received protection from the Mori clan in western Japan. Later, Toyotomi Hideyoshi requested that Yoshiaki accept him as an adopted son and the 16th Ashikaga Shogun, but Yoshiaki refused.