It is agreed that the period of copyright protection for his films prior to 1953 has been completely expired (they meet the criteria of both 50 years after the release and 38 years after the death of a director).
1953年までの作品は著作権の保護期間が完全に終了した（公開後50年と監督死後38年の両方を満たす）と考えられている。