Japan's Hiromu Inada is watching the Tokyo Olympics hoping to pick up some tips from the athletes before he competes in next year's Ironman world championship, at the age of 90. Inada, who turns 89 in November, already holds the Guinness World Record for the oldest person to complete an Ironman competition -- a gruelling format involving swimming 3.86 kilometres, biking 180.25 kilometres and running a 42.19 kilometre marathon. A three-time winner of the competition in his age group, his commitment to sport is so deep that he records footage of athletes at the Games and watches it to analyse leg movements and posture. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES