Ryōi Shintō-ryū (良移心当流) Kaiso (開祖 - Founder) - Fukuno Shichirouemon Masakatsu (福野七郎右衛門正勝) studied Yagyū Shinkage-ryū (柳生新陰流) Heihō (兵法 - martial strategy) under Yagyū Sekishūsai Taira-no-Munetoshi (柳生石舟斎平宗厳 ). Fukuno was a ‘Meishu’ (名手 – master) of Sumo (相撲) and a ‘Tatsujin’ (達人 – master expert) of the Yagyū Shinkage-ryū.

In the December 1996 issue of Japanese 'Hiden' magazine, Watanabe Tadashige (渡 辺 忠 成) suggests that through Fukuno, the Taisabaki (体捌) of Ryōi Shintō-ryū yawara-jutsu koshimawari (良移心当流和術腰廻) may have represented an important contribution to the formulation of Yagyū Shinkage-ryū (柳生新陰流) Mutō Dori (無刀捕) techniques.

Mutō Dori (無刀捕) from:
'The Life-Giving Sword: Secret Teachings from the House of the Shogun' by Munenori Yagyu & William Scott Wilson (translator) (2012):

"Munenori would write: The significance of the term No-Sword is not necessarily in having to take the sword of your opponent. Neither does it mean taking your own sword in display and making a name for yourself. No-Sword means not being cut by another, although you yourself have no sword. . . .

If your opponent does not want his sword taken, you should not insist on trying to take it. No-Sword is also in not taking the sword when your opponent has this attitude. A man who is consumed by the thought of not having his sword taken is going to forget the aim of cutting his opponent. When he thinks only of not having his sword taken, he will probably not cut you. . . .

What is called No-Sword is not the art of taking a man’s sword; it is being able to use all implements freely. When you have no sword and wish to take your opponent’s to use as your own, anything that comes into your hands should be of use. Even if you have only a fan, you should be able to defeat your opponent’s sword. No-Sword is just this attitude."