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Article 52Terms of Protection for Anonymous or Pseudonymous Works

第五十二条(無名又は変名の著作物の保護期間)

The copyright to an anonymous or pseudonymous work subsists for a period of 70 years after the work is made public; provided, however, that if, before the expiration of a duration of copyright for an anonymous or pseudonymous work, it is found that 70 years have elapsed since the death of the author of that work, the copyright is deemed to have expired at the time that is found to constitute the expiration of 70 years since the death of the author.

無名又は変名の著作物の著作権は、その著作物の公表後七十年を経過するまでの間、存続する。ただし、その存続期間の満了前にその著作者の死後七十年を経過していると認められる無名又は変名の著作物の著作権は、その著作者の死後七十年を経過したと認められる時において、消滅したものとする。

The provisions of the preceding paragraph do not apply in any of the following cases:

前項の規定は、次の各号のいずれかに該当するときは、適用しない。

the pseudonym adopted by the author of a pseudonymous work is commonly known to be that author's pseudonym;

変名の著作物における著作者の変名がその者のものとして周知のものであるとき。

the author's true name is registered pursuant to Article 75, paragraph (1), within the period referred to in the preceding paragraph;

前項の期間内に第七十五条第一項の実名の登録があつたとき。

the author makes the work public using the author's true name or the pseudonym by which the author is commonly known to indicate the name of the author, within the period referred to in the preceding paragraph.

著作者が前項の期間内にその実名又は周知の変名を著作者名として表示してその著作物を公表したとき。

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