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.
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 author's true name is registered pursuant to Article 75, paragraph (1), within the period referred to in the preceding paragraph;
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(Terms of Protection for Anonymous or Pseudonymous Works)
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…
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。
Open this provision(Registration of True Names)
The author of an anonymous or pseudonymous work that has been made public, may have the author's true name registered to that work, regardless of whether the author currently owns the copyright.
無名又は変名で公表された著作物の著作者は、現にその著作権を有するかどうかにかかわらず、その著作物についてその実名の登録を受けることができる。
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「著作物」
A creative expression of thoughts or feelings falling within the literary, academic, artistic or musical domain — a work in the narrow sense, as distinct from 著作物等 (works, performances, phonograms, broadcasts and cablecasts), which the Ministry's English also calls 'work'.
Defined inArticle 2, paragraph (1), item (i)· applies throughout the law
author
「著作者」
The person who creates a work (著作物).
Defined inArticle 2, paragraph (1), item (ii)· applies throughout the law
pseudonym
「変名」
A pen name, art name, abbreviated name or any other name used in place of a person's true name (実名).
Short name set inArticle 14, paragraph (1)
true name
「実名」
A person's own name, or a corporation's or other body's name (氏名又は名称).
Short name set inArticle 14, paragraph (1)
copyright
「著作権」
The economic rights of an author set out in Articles 21 to 28: the rights of reproduction, stage and musical performance, on-screen presentation, public transmission, recitation, exhibition, distribution, transfer of ownership, rental, translation and adaptation, and the original author's rights over the use of derivative works.
Short name set inArticle 17, paragraph (1)