Justin Gatlin, one of the top sprinters in the world, insists the future for Japanese sprinters looks promising.

One day before the Golden Grand Prix Kawasaki, the second meet on the IAAF World Challenge circuit, the smiling American said the development of elite Japanese sprinters like Aska Cambridge and Hakim Abdul Sani Brown has been noticeable in recent years.

Cambridge and Sani Brown will compete with the five-time Olympic medalist and also China's Su Bingtian, who ran the 100-meter sprint in 9.99 seconds in 2015 to become the first Mongoloid to break the 10-second barrier, in Sunday's meet, which will serve as one of domestic trials for August's world championships in London.