A statement or testimony given (often under oath) about facts or incidents, typically in a legal context (affidavit, deposition, or testimony).
被告は法廷で自分の無実を供述した。
The defendant gave a statement in court asserting his/her innocence.
検察は目撃者の供述を証拠として提出した。
The prosecution submitted the witness's testimony as evidence.
供述書を作成して弁護士に提出する。
Prepare a written statement and submit it to the lawyer.