# 不正競争防止法 / Unfair Competition Prevention Act — 第十三条 (Article 13) - Law: 不正競争防止法 (Unfair Competition Prevention Act), 平成五年法律第四十七号 - English title "Unfair Competition Prevention Act": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第十三条 (Article 13)（当事者尋問等の公開停止） — address `art-13` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/en/unfair-competition-prevention-act/art-13 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/405AC0000000047/art-13 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第十三条（当事者尋問等の公開停止） — (Suspension of the Open Examination of Parties) caption: Ministry of Justice translation — Japanese Law Translation Database System art-13 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13 · https://japanlaw.org/l/405AC0000000047/art-13 **第一項** 不正競争による営業上の利益の侵害に係る訴訟における当事者等が、その侵害の有無についての判断の基礎となる事項であって当事者の保有する営業秘密に該当するものについて、当事者本人若しくは法定代理人又は証人として尋問を受ける場合においては、裁判所は、裁判官の全員一致により、その当事者等が公開の法廷で当該事項について陳述をすることにより当該営業秘密に基づく当事者の事業活動に著しい支障を生ずることが明らかであることから当該事項について十分な陳述をすることができず、かつ、当該陳述を欠くことにより他の証拠のみによっては当該事項を判断の基礎とすべき不正競争による営業上の利益の侵害の有無についての適正な裁判をすることができないと認めるときは、決定で、当該事項の尋問を公開しないで行うことができる。 art-13/par-1 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-1 · https://japanlaw.org/l/405AC0000000047/art-13/par-1 In litigation involving infringement that may harm business interests through unfair competition, if a party, legal representative, or witness is to be examined regarding a matter that serves as the basis for determining whether the infringement occurred and the matter falls under trade secrets held by that party, and if the court, by the unanimous agreement of the judges, finds that the party, legal representative, or witness is unable to provide a sufficient statement because it is clear that giving such a statement in open court would significantly hinder the party's business activities based on the trade secrets, and that, without the statement, the court would be unable to make an appropriate judicial decision regarding whether the infringement occurred, the court may rule to conduct the examination of the matter in a closed session. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 裁判所は、前項の決定をするに当たっては、あらかじめ、当事者等の意見を聴かなければならない。 art-13/par-2 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-2 · https://japanlaw.org/l/405AC0000000047/art-13/par-2 The court must hear the opinions of the parties, etc. in advance before making the ruling under the preceding paragraph. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 裁判所は、前項の場合において、必要があると認めるときは、当事者等にその陳述すべき事項の要領を記載した書面又はこれに記載すべき事項を記録した電磁的記録の提示をさせることができる。この場合においては、何人も、その提示された書面又は電磁的記録の開示を求めることができない。 art-13/par-3 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-3 · https://japanlaw.org/l/405AC0000000047/art-13/par-3 In the case referred to in the preceding paragraph, if the court finds it necessary, the court may order a party, etc., to present the court with a document outlining the matters to be stated or an electronic or magnetic record recording the matters that are to be written in such a document. In such a case, no person may request the disclosure of the presented document or electronic or magnetic record. machine translation, not official **第四項** 裁判所は、前項後段の書面又は電磁的記録を開示してその意見を聴くことが必要であると認めるときは、当事者等、訴訟代理人又は補佐人に対し、当該書面又は当該電磁的記録を開示することができる。 art-13/par-4 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-4 · https://japanlaw.org/l/405AC0000000047/art-13/par-4 If the court finds it necessary to disclose the documents or electronic or magnetic records under the second sentence of the preceding paragraph and to hear opinions, the court may disclose them to the relevant parties, etc., the counsel, or the assistant in court. machine translation, not official **第五項** 裁判所は、第一項の規定により当該事項の尋問を公開しないで行うときは、公衆を退廷させる前に、その旨を理由とともに言い渡さなければならない。当該事項の尋問が終了したときは、再び公衆を入廷させなければならない。 art-13/par-5 · https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-5 · https://japanlaw.org/l/405AC0000000047/art-13/par-5 If the court is to conduct an examination on a matter without opening it to the public pursuant to the provisions of paragraph (1), it must make a statement to that effect along with the reason for it to the members of the public before having them leave the courtroom. When the examination on the matter ends, the court must allow the members of the public to re-enter the courtroom. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-13/par-2: 前項 → 不正競争防止法 第十三条第一項 (Article 13, paragraph (1)), art-13/par-1 — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-1 · https://japanlaw.org/l/405AC0000000047/art-13/par-1 - art-13/par-3: 前項 → 不正競争防止法 第十三条第二項 (Article 13, paragraph (2)), art-13/par-2 — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-2 · https://japanlaw.org/l/405AC0000000047/art-13/par-2 - art-13/par-4: 前項 → 不正競争防止法 第十三条第三項 (Article 13, paragraph (3)), art-13/par-3 — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-3 · https://japanlaw.org/l/405AC0000000047/art-13/par-3 - art-13/par-5: 第一項 → 不正競争防止法 第十三条第一項 (Article 13, paragraph (1)), art-13/par-1 — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-1 · https://japanlaw.org/l/405AC0000000047/art-13/par-1 ## Cited by 6 provisions cite this one. No official source publishes this direction. - 不正競争防止法 第十条第一項第一号（秘密保持命令） — https://japanlaw.org/en/unfair-competition-prevention-act/art-10/par-1/item-1 · https://japanlaw.org/l/405AC0000000047/art-10/par-1/item-1 - 不正競争防止法 第十三条第二項（当事者尋問等の公開停止） — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-2 · https://japanlaw.org/l/405AC0000000047/art-13/par-2 - 不正競争防止法 第十三条第三項（当事者尋問等の公開停止） — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-3 · https://japanlaw.org/l/405AC0000000047/art-13/par-3 - 不正競争防止法 第十三条第四項（当事者尋問等の公開停止） — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-4 · https://japanlaw.org/l/405AC0000000047/art-13/par-4 - 不正競争防止法 第十三条第五項（当事者尋問等の公開停止） — https://japanlaw.org/en/unfair-competition-prevention-act/art-13/par-5 · https://japanlaw.org/l/405AC0000000047/art-13/par-5 - 不正競争防止法 第十九条第一項（適用除外等） — https://japanlaw.org/en/unfair-competition-prevention-act/art-19/par-1 · https://japanlaw.org/l/405AC0000000047/art-19/par-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 不正競争防止法 — the text in force from 2026-05-21 (https://laws.e-gov.go.jp/law/405AC0000000047/20260521_507AC0000000039), retrieved 2026-10-11 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Unfair Competition Prevention Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4920/tb), retrieved 2026-10-11 - claude-sonnet-5-5 — Machine translation, batch unfair-competition-prevention-act-20261011T031431-001, translated 2026-10-11 - This site's parser, version 189 — 不正競争防止法 — structure, counts, cross-references and defined terms, computed 2026-10-11