[sentence]。しかしながら、[sentence]。
Fixed conjunctive expression; placed at the beginning of a sentence to introduce contrast. More formal/literary than しかし.
しかしながら is a formal conjunction meaning "however," "nevertheless," or "but." It is used to introduce a statement that contrasts with or contradicts what was previously said, similar to しかし but with a more literary and emphatic tone.
Despite containing ながら, しかしながら functions as a fixed expression (a single conjunction), not as a typical V[stem] + ながら construction. It is best understood as a set phrase rather than being broken down into parts.
しかしながら is typically placed at the beginning of a sentence to signal a contrast or unexpected turn from the preceding statement. It is common in formal writing, speeches, academic papers, and news reports.
しかしながら carries a nuance of acknowledging the preceding point while firmly presenting a contrasting view. It adds weight and gravity to the contrast, making it suitable for situations where the speaker wants to be both respectful and assertive.