両手裏拳横打ち
Ryōte uraken yoko uchi
Double backfist side strike

 

Ryōte uraken yoko uchi yōi
Naihanchi dachi
Look to alternating sides when striking. Bend the wrist slightly so you strike with the knuckles. Return to yōi after each repetition

Ryōte uraken yoko uchi (click for pronunciation) is one of the exercises of the kihon renshū of Shōrin ryū Seibukan.

Shimabukuro Zenshun 島袋善俊

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