He was the only successor of the Kokin Denju at that time, and it is said that Emperor Goyozei was afraid the Kokin Denju might be lost at the Battle of Sekigahara, and that this was why he helped Yusai with the Imperial order.
当時唯一の古今伝授の伝承者であり、関ヶ原の戦いのときに後陽成天皇が勅命で幽斎を助けたのも古今伝授が途絶える事を恐れたためと言われる。