外裏拳打ち
Soto uraken uchi
Outward backfist strike

Also known as uraken yoko mawashi uchi 裏拳横回し打ち (side roundhouse backfist strike) or uraken uchi yoko mawashi 裏拳打ち横回し.

Thomas Züllich
Nikko Dojo

 

 

Nakayama Masatoshi 中山正敏

 

 

空手道技を極める
Karatedō: Master the Technique

 

 

 

Jōdan oi soto uraken uchi 上段追い外裏拳打ち (upper level lunge outward backfist strike)

Okazaki Teruyuki 岡崎照幸
Shōtōkan

Okazaki Teruyuki and Milorad V Stricevic, The Textbook of Modern Karate

 

 

Ohgami Shingo
Wadō ryū

Introduction to Karate

 

 

Uraken hizo uchi 裏拳脾臓打ち (backfist strike to spleen)

Kyokushinkai

Ōyama Masutatsu, This Is Karate

 

 

Furi uchi 振り打ち (swinging strike)
Nakamura Tadashi 中村忠

Seidō