Is it too soon to speculate?
When Olympic Champion Kohei Uchimura was asked, he didn’t name the younger Tanaka brother, he named Ryohei Kato.
Ryohei: In London, I had promised myself to defeat Kohei Uchimura one day. As for the team competitions, I will work hard with the team to get the gold medal for Japan be it in the World Championships or the Olympics.
Host: What do you think about Kato saying that he wants to defeat you one day?
Kohei: In 4 years time, I think he will be the strongest competitor. If possible, I would like for us to compete for the same gold medal on the same stage. …
Ryohei is the son of Hiroyuki Kato, the Japanese Olympic coach in London.
Ryohei turns age-19 today.
Gymnastics Coaching.com 