expression, conjunction
A conjunction used to introduce a contrasting statement, similar to しかし but often with a slightly more formal or literary feel. It can appear at the beginning of a sentence or clause.
See also: しかし
彼は努力した。がしかし、結果は思わしくなかった。
He made an effort. However, the results were not satisfactory.
この計画は完璧に見える。がしかし、実行には多くの問題がある。
This plan looks perfect. However, there are many problems in its execution.