A formal conjunction meaning 'however' or 'nevertheless', used to introduce contrasting or opposing information; common in written/formal contexts.
提案は魅力的である。しかしかしながら、予算が足りない。
The proposal is attractive; however, the budget is insufficient.
実験の結果は良好だった。しかしかなりの時間がかかった。
The experiment's results were good. Nevertheless, it took considerable time.
彼の説明は明快だ。しかしかなり専門的で一般向けではない。
His explanation is clear; nevertheless, it's quite technical and not suitable for a general audience.