①A person alleging that their rights are violated due to dissemination of information through specified telecommunications, may demand the disclosure of sender identification information to the specified telecommunications service provider that uses a specified telecommunication facility for the purpose of providing the specified telecommunications with respect to the sender identification information, relative to violating the person's rights, held by the specified telecommunications service provider; other than the specified sender identification information, (which is specified in Order of the Ministry of Internal Affairs and Communications as sender identification information that relates solely to the violation-related telecommunications; the same applies hereinafter in this paragraph and Article 15, paragraph (2)) if both item (i) and (ii) below are applicable, and in the case of the specified sender identification information, it is applicable if all of the items below are applicable.

②A person alleging that their rights are violated due to dissemination of information through specified telecommunications may demand that a telecommunications service provider that uses telecommunications facilities used for the violation-related telecommunications pertaining to the specified telecommunications (excluding any specified telecommunications service provider pertaining to such specified telecommunications as prescribed in the preceding paragraph; hereinafter in this paragraph referred to as a "relevant telecommunications service provider") disclose sender identification information pertaining to the violation-related telecommunications possessed by the relevant telecommunications service provider if all of the following items are applicable:

③The term "violation-related telecommunications" as used in the preceding two paragraphs means transmission by telecommunications of identification codes (which refers to characters, numbers, symbols, and other codes used by the specified telecommunications service provider in providing the specified telecommunications service in order to identify a certain person who may receive the provision of the specified telecommunications service and distinguish the person from other persons) and other codes relating to the specified telecommunications service conducted by the sender of violating information in order to use or terminate the use of the specified telecommunications service pertaining to the transmission of the violating information, as prescribed in Order of the Ministry of Internal Affairs and Communications as those falling within the necessary scope in order to specify the sender of the violating information.

①If the related disclosing service provider receives a claim as prescribed in paragraph (1) or (2) of the preceding Article, the provider must hear the opinion of the sender of the violating information pertaining to the demand for disclosure on whether the sender consents to the disclosure of the sender's identification information (including grounds for the opinion if the sender is of an opinion that the demand for the disclosure should not be accommodated), except if the provider is unable to contact the sender or if there are any other special circumstances.

②If the disclosure related service provider receives a sender identification information disclosure order, then without delay, the provider must so notify the sender of violating information subject to the sender identification information disclosure order, who expressed an opinion that the demand for the disclosure as prescribed in paragraph (1) or (2) of the preceding Article should not be accommodated when the opinion was sought pursuant to the preceding paragraph (but limited to that relating to the sender identification information disclosure order), except if it is difficult to notify the sender.

③When the disclosure related service provider receives sender identification information under the order from any other disclosure related service provider who received an order pursuant to the provisions of Article 15, paragraph (1) (limited to the portion relating to item (ii)), the related disclosing service provider as the recipient must not use the sender identification information for any purposes other than identifying sender identification information (limited to portions relating to the violating information) possessed by the provider.

④The disclosure related service provider is not liable for any damages incurred by the person who demanded the disclosure prescribed in the provisions of paragraph (1) or (2) of the preceding Article due to provider's refusal of that demand, unless the damages were due to an intentional act or gross negligence on the part of the provider; provided, however, that this does not apply if the disclosure related service provider is the sender of the violating information pertaining to the demand for disclosure.

A person to whom the sender identification information has been disclosed as prescribed in the provisions of Article 5, paragraph (1) or (2) must not use the sender identification information without a good reason to commit an act that unjustly damages the reputation or would disturb the peaceful life of the sender.