If a person who is or was engaged in affairs concerning an investigation related to national tax (including an investigation for the examination of a case pertaining to an appeal and an investigation of a criminal case as prescribed in Article 131, paragraph (1) (Questioning, Inspection, Retention, etc.)) or an investigation for the provision of information conducted pursuant to the provisions of the Act on Exemption, etc. of Income Tax, etc. on Income of Foreign Residents, etc. Based on the Principle of Reciprocity (Act No. 144 of 1962) or the Act on Special Provisions of the Income Tax Act, the Corporation Tax Act and the Local Tax Act Incidental to Enforcement of Tax Treaties, etc., or in affairs concerning the collection of national tax or the collection of taxes of a treaty partner conducted pursuant to the provisions of that Act, divulges or misappropriates a secret that the person was able to learn in connection with those affairs, the person is subject to imprisonment for not more than two years or a fine of not more than 1,000,000 yen.
国税に関する調査（不服申立てに係る事件の審理のための調査及び第百三十一条第一項（質問、検査又は領置等）に規定する犯則事件の調査を含む。）若しくは外国居住者等の所得に対する相互主義による所得税等の非課税等に関する法律（昭和三十七年法律第百四十四号）若しくは租税条約等の実施に伴う所得税法、法人税法及び地方税法の特例等に関する法律の規定に基づいて行う情報の提供のための調査に関する事務又は国税の徴収若しくは同法の規定に基づいて行う相手国等の租税の徴収に関する事務に従事している者又は従事していた者が、これらの事務に関して知ることのできた秘密を漏らし、又は盗用したときは、二年以下の拘禁刑又は百万円以下の罰金に処する。