How does kobayashi stay ripped when he eats all those hot dogs?  
Mtv had a special on competitive eaters following an American and Kobayashi.   
 
Kobayashi body builds as part of his training for competitive eating. 
    
His whole program has a zen and Japanese logicality to it, eating carbs or proteins at different stages of trading meals. 
 
As well he doesn't eat like that all the time.