expression
on the other hand; in contrast; conversely
Used to contrast two situations, often implying that the latter is more positive or favorable. Functions as a conjunction-like phrase.
彼は勉強が苦手だが、そこへ行くと妹は優秀だ。
He is not good at studying, but his younger sister, on the other hand, is excellent.
都会は物価が高い。そこへ行くと田舎は生活費が安い。
Prices are high in the city. In contrast, the cost of living is low in the countryside.