# 不正競争防止法 / Unfair Competition Prevention Act — 第四条 (Supplementary Provisions, Article 4) - 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: 第四条 (Supplementary Provisions, Article 4) — address `suppl-4051-47/art-4` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-4 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-4 - 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. --- ### 第四条 suppl-4051-47/art-4 · https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-4 · https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-4 **第一項** 第三条から第五条まで、第十四条及び第十五条第一項の規定は、平成三年六月十五日前に行われた第二条第一項第四号に規定する営業秘密不正取得行為又は同項第八号に規定する営業秘密不正開示行為に係る同項第四号から第六号まで、第八号又は第九号に掲げる不正競争であって同日以後に行われるもの（次の各号に掲げる行為に該当するものを除く。）及び同日前に開始した同項第七号に規定する営業秘密を使用する行為を継続する行為については、適用しない。 suppl-4051-47/art-4/par-1 · https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-4/par-1 · https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-4/par-1 The provisions of Articles 3 through 5, Article 14, and Article 15, paragraph (1) do not apply to acts of unfair competition prescribed in Article 2, paragraph (1), items (iv) through (vi), item (viii), and item (ix), in connection with an act of wrongful acquisition of trade secrets prescribed in item (iv) of the same paragraph, or an act of improper disclosure of trade secrets prescribed in item (viii) of the same paragraph, that occurred before June 15, 1991, if those acts of unfair competition were committed on or after that date (excluding acts falling under the following items). The provisions also do not apply to the continuation of the act of using trade secrets as prescribed in item (vii) of the same paragraph that began before that date: Ministry of Justice translation — Japanese Law Translation Database System **一** 第二条第一項第四号から第六号まで、第八号及び第九号に規定する営業秘密を開示する行為 suppl-4051-47/art-4/par-1/item-1 · https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-4/par-1/item-1 · https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-4/par-1/item-1 the act of disclosing trade secrets as prescribed in Article 2, paragraph (1), items (iv) through (vi), item (viii), and item (ix); and Ministry of Justice translation — Japanese Law Translation Database System **二** 第二条第一項第五号及び第八号に規定する営業秘密を取得する行為並びにこれらの行為により取得した営業秘密を使用する行為 suppl-4051-47/art-4/par-1/item-2 · https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-4/par-1/item-2 · https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-4/par-1/item-2 the act of acquiring trade secrets as prescribed in Article 2, paragraph (1), item (v) and (viii), and the act of using trade secrets acquired through the act. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - suppl-4051-47/art-4/par-1: 第三条から第五条まで → 不正競争防止法 第三条 (Article 3), art-3 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-3 · https://japanlaw.org/l/405AC0000000047/art-3 - suppl-4051-47/art-4/par-1: 第三条から第五条まで → 不正競争防止法 第四条 (Article 4), art-4 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-4 · https://japanlaw.org/l/405AC0000000047/art-4 - suppl-4051-47/art-4/par-1: 第三条から第五条まで → 不正競争防止法 第五条 (Article 5), art-5 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-5 · https://japanlaw.org/l/405AC0000000047/art-5 - suppl-4051-47/art-4/par-1: 第十四条 → 不正競争防止法 第十四条 (Article 14), art-14 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-14 · https://japanlaw.org/l/405AC0000000047/art-14 - suppl-4051-47/art-4/par-1: 第十五条第一項 → 不正競争防止法 第十五条第一項 (Article 15, paragraph (1)), art-15/par-1 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-15/par-1 · https://japanlaw.org/l/405AC0000000047/art-15/par-1 - suppl-4051-47/art-4/par-1: 第二条第一項第四号 → 不正競争防止法 第二条第一項第四号 (Article 2, paragraph (1), item (iv)), art-2/par-1/item-4 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-4 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-4 - suppl-4051-47/art-4/par-1: 同項第八号 → 不正競争防止法 第二条第一項第八号 (Article 2, paragraph (1), item (viii)), art-2/par-1/item-8 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-8 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-8 - suppl-4051-47/art-4/par-1: 同項第四号から第六号まで → 不正競争防止法 第二条第一項第五号 (Article 2, paragraph (1), item (v)), art-2/par-1/item-5 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-5 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-5 - suppl-4051-47/art-4/par-1: 同項第四号から第六号まで → 不正競争防止法 第二条第一項第六号 (Article 2, paragraph (1), item (vi)), art-2/par-1/item-6 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-6 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-6 - suppl-4051-47/art-4/par-1: 第九号 → 不正競争防止法 第二条第一項第九号 (Article 2, paragraph (1), item (ix)), art-2/par-1/item-9 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-9 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-9 - suppl-4051-47/art-4/par-1: 同項第七号 → 不正競争防止法 第二条第一項第七号 (Article 2, paragraph (1), item (vii)), art-2/par-1/item-7 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-7 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-7 - suppl-4051-47/art-4/par-1/item-1: 第二条第一項第四号から第六号まで → 不正競争防止法 第二条第一項第四号 (Article 2, paragraph (1), item (iv)), art-2/par-1/item-4 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-4 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-4 - suppl-4051-47/art-4/par-1/item-1: 第二条第一項第四号から第六号まで → 不正競争防止法 第二条第一項第五号 (Article 2, paragraph (1), item (v)), art-2/par-1/item-5 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-5 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-5 - suppl-4051-47/art-4/par-1/item-1: 第二条第一項第四号から第六号まで → 不正競争防止法 第二条第一項第六号 (Article 2, paragraph (1), item (vi)), art-2/par-1/item-6 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-6 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-6 - suppl-4051-47/art-4/par-1/item-1: 第八号 → 不正競争防止法 第二条第一項第八号 (Article 2, paragraph (1), item (viii)), art-2/par-1/item-8 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-8 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-8 - suppl-4051-47/art-4/par-1/item-1: 第九号 → 不正競争防止法 第二条第一項第九号 (Article 2, paragraph (1), item (ix)), art-2/par-1/item-9 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-9 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-9 - suppl-4051-47/art-4/par-1/item-2: 第二条第一項第五号 → 不正競争防止法 第二条第一項第五号 (Article 2, paragraph (1), item (v)), art-2/par-1/item-5 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-5 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-5 - suppl-4051-47/art-4/par-1/item-2: 第八号 → 不正競争防止法 第二条第一項第八号 (Article 2, paragraph (1), item (viii)), art-2/par-1/item-8 — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-8 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-8 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 不正競争防止法 第二条第一項第四号（定義） — https://japanlaw.org/ja/unfair-competition-prevention-act/art-2/par-1/item-4 · https://japanlaw.org/l/405AC0000000047/art-2/par-1/item-4 - 不正競争防止法 附則第十四条第一項（政令への委任） — https://japanlaw.org/ja/unfair-competition-prevention-act/suppl-4051-47/art-14/par-1 · https://japanlaw.org/l/405AC0000000047/suppl-4051-47/art-14/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