but, on the other hand
彼は有能な人だが、他方では、私たちに要求が多すぎる。
He is competent, but on the other hand, he demands too much of us.
彼の言葉は厳しいが、他方では心はやさしい。
Although his words are harsh, he is kind at heart.
彼は頭はよいが、他方ではしばしば軽率な間違いをする。
He is intelligent, but on the other hand, he often makes careless mistakes.