Kozuka seems to have been raised very traditional - proper and respectful.
I read a fan's account of an encounter with him in Beijing. This fan of Kozuka spotted him and Oda during the Junior comp so she and a friend came over to meet them while the rest of the "stalkers" were around Patrick. She still needed a picture with Kozuka after her friend had taken off. Knowing a more Westernized Oda was quite easy going, she asked him to take a photo of her and Kozuka. Koz was rather uncomfortable about it because Oda was his elder and such request was considered disrespectful. Oda didn't mind but Kozuka was apologetic about the impoliteness. Of course, after the crash with Dai, Koz was extremely contrite about it and couldn't apologize enough.
These big fans of Japanese skaters found Patrick first and went to sit aound him. They became so comfortable with him they didn't want to move away to continue their star search. His warmth and friendliness were attributed as North American and contrasted with the Japanese reservedness. Takahashi is very proper in the Japanese fashion too but he has a higher status, the big brother of the three.