I guess someone mentioned to him that he wasn't a little twig; he was also uncomfortable being the size he was. Over the year, he lost some weight and he's happy where he is. It's all in the interview I posted..but I'll post it again
http://img.photobucket.com/albums/v2...dinterview.jpg
http://img.photobucket.com/albums/v2...interview2.jpg
http://img.photobucket.com/albums/v2...interview3.jpg
it's on the third page...about a 'chip on his shoulder' (Kaito's).