Video: Renshu Ichi Kumite
Both Renshu Kumite Ichi and Renshu Kumite Ni were developed by So Shihan Masayuki Hisataka in 1963 shortly after his arrival in New York and stemmed from his observation and teaching classes of non-Japanese for the first time. He observed that, in general, western sports favored lateral motion over angular motion and thus one of the prime aims of the Renshu Kumite Ni is to emphasize angular motion. The Renshu Kumite(s) contain most of the basic techniques and principles of Karatedo. Renshu Kumite Ichi emphasizes the use of the front hand and is recommended for 10th and 9th kyu students while Renshu Kumite Ni teaches the use of the back hand, and is recommended for 8th and 7th kyu students.