ATTACK: Face slash with knife. Oof.

1. Kotogaeshi. Step in and close to uke. Block slashing knife hand with two hands - one on shoulder the other on forearm, i think. Hmm. Hand on shoulder slides outside edge of hand down the outside edge of uke's arm and to back fo uke hand, other hand does wrist-three finger grab, i think. I still think you may turn hips for powering lock. but I forget.