A conjunctive phrase used to introduce a contrasting or opposite aspect after stating one side of a matter; 'on the other hand'.
この車は燃費が良い。その反面、加速が少し遅い。
This car has good fuel economy. On the other hand, its acceleration is a bit slow.
彼は仕事が非常に早い。その反面、細かいミスが多い。
He works very quickly. On the other hand, he makes many small mistakes.
都会は便利だ。その反面、自然が少ないという欠点もある。
The city is convenient. On the other hand, it also has the drawback of little nature.