http://www.shenmue-uk.com/shenmue_uk_tips_s1.html
..that Ryo's attitude changes if you beat Chai at the arcade. Is there any truth to this? If so, what are some examples?
EDIT: Quote from the link:
Once chai is defeated, you have to free the You Arcade owner and go on a search for chai, which leads you to the Asia travel co. as usual, however ryo's attitude changes after he beats chai and is quite cool.