During the generation of Ujikiyo YAMANA, the son of Tokiuji, the Yamana clan served as the shugo of 11 provinces out of the 66 provinces in Japan, and prevailed their power as to be called "Roku-bun no ichi dono" (Mr. One-Sixth).
時氏の子・山名氏清のとき、一族で全国66ヶ国中11ヶ国の守護職を占め、「六分の一殿」と称されて権勢を誇った。