# 不正競争防止法 / Unfair Competition Prevention Act — 第九条 (Article 9) - 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: 第九条 (Article 9)（相当な損害額の認定） — address `art-9` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/en/unfair-competition-prevention-act/art-9 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/405AC0000000047/art-9 - 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. --- ### 第九条（相当な損害額の認定） — (Determination of Reasonable Amount of Loss or Damage) caption: Ministry of Justice translation — Japanese Law Translation Database System art-9 · https://japanlaw.org/en/unfair-competition-prevention-act/art-9 · https://japanlaw.org/l/405AC0000000047/art-9 **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、損害が生じたことが認められる場合において、損害額を立証するために必要な事実を立証することが当該事実の性質上極めて困難であるときは、裁判所は、口頭弁論の全趣旨及び証拠調べの結果に基づき、相当な損害額を認定することができる。 art-9/par-1 · https://japanlaw.org/en/unfair-competition-prevention-act/art-9/par-1 · https://japanlaw.org/l/405AC0000000047/art-9/par-1 In litigation involving infringement that may harm business interests through unfair competition, if the court finds that loss or damage has actually been incurred but it is extremely difficult to prove the facts necessary to determine the amount of loss or damage due to the nature of the facts, the court may determine a reasonable amount of loss or damage based on the entirety of the oral arguments and the results of the examination of the evidence. Ministry of Justice translation — Japanese Law Translation Database System ## Cited by 2 provisions cite 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 - 不正競争防止法 附則第二条第一項（経過措置） — https://japanlaw.org/en/unfair-competition-prevention-act/suppl-4151-46/art-2/par-1 · https://japanlaw.org/l/405AC0000000047/suppl-4151-46/art-2/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