西村信紀流速いボールの投げ方（２）移動している体を止めないと、腕のスイングスピードは速くならない

The softball videos uploaded here are purely personal records of Hiroshi Yamazaki, who has been experimenting with the jumping pitching technique since he was 57, declaring, "I'm going to beat Nobuyuki Nishimura at 70!" However, since the instructors are Nobuyuki Nishimura and Takuo Hirose, two of Japan's leading pitchers, I thought it would be a shame for me to be the only one to know about it, so I uploaded the videos in the hope that their instruction and pitching techniques might be helpful to others. Therefore, the questions and inquiries in the videos are ones that Yamazaki personally wants to know or doesn't understand. For anything not explained in the videos, I provide additional information on "NSAB: All About Softball" http://ipansyadan-nsab.com/ If you're interested, please take a look there.