People always say Japan has no racism, even when sometimes some racist phrases are not intended and don't mean to be racist. You are abso-fucking-lutely wrong. When they are being racist, they fucking mean it. Check this damn news:

【物議】対馬で韓国人観光客が“逆ギレ”禁煙の神社で喫煙ポイ捨て注意も怒鳴り声…韓国人出入り禁止に（FNN...