Taipei definitely wins this one.
Its metropolitan population is around 7 million.
Although New Taipei City has more people than Taipei City itself, it's basically a commuter town for Taipei.これは台北の勝ちだよ
台北の都市圏人口は700万だよ。
台北市よりも新北市の方が人口が多いけど、新北市は台北のベッドタウン。