JKA Certified Competition Sports Kendamas Oozora Kendama - Cherry Red Product The Oozora kendama is made by Japanese woodcraft company Yamagata Koubou. The cherry red color is one of the most popular kendama colors. TK16 Master Kendama - Blue Product The TK16 Master is a JKA certified kendama made in China for the Japanese company H Alpha. The blue color is one of the most popular kendama colors.