This seminar (שיעור שבועי:חצי קלינצ') deals with Akban combat Ninjutsu strategies against the half clinch or collar tie.
Teacher is Akban's headmaster Yossi Sheriff
Video Summery of all the techniques and basic strategy
Video of Tani otoshi against half clinch
Video of Kubi nage against half clinch
Video of Renyo kata against collar tie
Video of Sag throw against collar tie
Video of Fireman's carry against a collar tie