1 2 3 4 5
Count #4 - Ushiro-no-kuzushi:
The attacker attacks with seiken ago uchi/gyaku tsuki. The defender moves ushiro suri ashi, blocks the ago uchi with gyaku osea uke, steps hidari ayumi ashi & blocks oi osea uke & executes migi chudan mae geri/jodan gyaku tsuki.

(See Chudan chuken kamae, pages 66/67; Oyama, Mas; Advanced Karate, Chapter 4; (C) 1970, First Printing, Japan Trading Co.: pages 118/119; Lowe, Bobby, Kyokushin Karate, Self-defense Techniques; (C)1999 Bobby Lowe.)

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