Takagiyoshin Ryu Tengu Dori (Okake Dori Henka) 高木楊心流 天狗捕り

At the end of this technique you grab the kyusho bonokubo, and slam the uke's face into the floor. Bonokubo was a new one for me. It's such a strange sounding word that I thought it was a joke at first.  It means the "indent on the underside of a tray".
盆の凹 the first character means "tray" and the second is "indent" or "conacave".  Basically you grab either side of chidome.