Mutō Dori (無刀捕) of the Yagyū Shinkage-ryū (柳生新陰流) from an article (in Japanese) by Watanabe Tadashige (渡 辺 忠 成) published in 'Hiden' magazine December 1996 (translated by Eric Grousilliat, 2017).

無手勢 “MUSHUSEI (form of the empty hand)

I stand in Muto position, advance in Raito position (sword raised above the head) and hit the head (photo 1). I go back deeply so as to place my shoulder under the elbow of the opponent. While raising the outstretched arm and catching his collar or his hair (photo 2), one takes a big step of the right foot on his back (photos 3-6). The opponent is dropped by lowering the body (photos 7-8)”