Among his six brothers and sisters, he was the only person that the art of divination 'Koyoryu byozeisho (Selections on Divination of Illness of Koyo-ryu school)' based on "Koyo Gunkan," the art of warfare of Shingen TAKEDA was handed down by word of mouth as had been passed down for generations to the family.
伊藤家家伝の易学で武田信玄の兵法『甲陽軍鑑』をベースとする「甲陽流病筮鈔（びょうぜいしょう）」を口伝により6人兄弟姉妹の中でただ一人受け継ぐ。