The leading actor of Taipei 21 is a realtor by day and serves Japanese tourists in a nightclub by night. When they hear him speak Japanese in the movie, many people immediately think of Takeshi Kaneshiro, a superstar of Taiwanese and Japanese blood.
由於《台北二一》的男主角是一名白天賣房子，晚上在酒店打工、接待日本觀光客的年輕上班族，很多人一聽到這個角色要說日文，就直覺聯想到擁有中日血統的當紅巨星金城武。