# 不正競争防止法 / Unfair Competition Prevention Act — 第八条 (Article 8) - 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: 第八条 (Article 8)（損害計算のための鑑定） — address `art-8` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/en/unfair-competition-prevention-act/art-8 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/405AC0000000047/art-8 - 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. --- ### 第八条（損害計算のための鑑定） — (Expert Opinions on the Calculation of the Amount of Loss or Damage) caption: Ministry of Justice translation — Japanese Law Translation Database System art-8 · https://japanlaw.org/en/unfair-competition-prevention-act/art-8 · https://japanlaw.org/l/405AC0000000047/art-8 **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いて、当事者の申立てにより、裁判所が当該侵害の行為による損害の計算をするため必要な事項について鑑定を命じたときは、当事者は、鑑定人に対し、当該鑑定をするため必要な事項について説明しなければならない。 art-8/par-1 · https://japanlaw.org/en/unfair-competition-prevention-act/art-8/par-1 · https://japanlaw.org/l/405AC0000000047/art-8/par-1 In litigation involving infringement that may harm business interests through unfair competition, if the court, at the request of a party, orders an expert opinion on matters necessary to calculate the amount of loss or damage caused by the act of infringement, the parties must explain the necessary matters to the expert for forming the opinion. Ministry of Justice translation — Japanese Law Translation Database System ## Cited by 1 provision cites this one. No official source publishes this direction. - 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 - This site's parser, version 189 — 不正競争防止法 — structure, counts, cross-references and defined terms, computed 2026-10-11