at the meet in may, masao played the role of handler. his work behind the scenes helped bring him into the top international ranks. >> translator: what i like best about him is that he makes the most of every experience, even failure. >> reporter: in the bike event, jumpei is using a hand cycle. he reaches speeds up to 50 kilometers per hour. after the bike, he runs using a wheelchair. he says this is a part where he needs the most work. >> reporter: masao try to figure out what's the best way to position me in the wheel chair, adjusting parts for different sitting positions. >> reporter: jumpei has a spirited discussion with masao about how to improve his performance. they refine everything down to the last detail. >> translator: isn't it better to have your right leg at a higher angle? >> translator: no. the right leg is fine. but the left one feels like it's locked. >> reporter: jumpei says masao is always willing to help and that really motivates him while he's training. >> translator: first, i want to win a gold medal at the paralym