It is said that when Tadayuki had his Hakamagishiki (ceremony to fit a child with a hakama (Japanese skirt)) at age four, Tomonobu MORI said to him, 'Achieve more than your father.'
忠之が4歳の袴着式を迎えた時、母里友信は「父上以上の功名を挙げなさい」と言ったという。