(9) For those who can read Japanese, there are a number of works about Morihei Ueshiba himself and also about his early students that have not been translated.
Two works, by Shimizu Yutaka, deal with esoteric aspects of Ueshiba's thinking: 清水豊, 『古事記と植芝盛平 合気道と神道の世界』, 2006,
(Shimizu Yutaka, Kojiki und Ueshiba Morihei: Aikido und die Welt des Shinto) ビイング・ネット・プレス; 清水豊, 『神仙道と植芝盛平 合気道と太極拳をつなぐ道教の世界』 , 2008, (
"Shinzendo und Ueshiba Morihei: Die taoistische Welt, die Aikido und Taijiquan verbindet) ビイング・ネット・プレス.