一本足立ち中段内落とし
Ippon ashi dachi chūdan uchi otoshi
Mid-level inside dropping block in one-legged stance

 

Shimabukuro Zenpō 島袋善保
Seisan
Shorin ryū Seibukan

Zenpo Shimabukuro and Dan Smith, Shorin ryū Seibukan: Kyan's Karate