The decisions referred to in the items of the preceding Article (referred to as "decision on disclosure or non-disclosure") must be made within thirty days from the date the request for disclosure has been made; provided, however, that if a correction is requested pursuant to the provisions of Article 4, paragraph (2), the number of days required for the correction is not to be included in that period.
Notwithstanding the provisions of the preceding paragraph, when there are reasonable grounds such as difficulties in handling administrative affairs, the head of an administrative organ may extend the period prescribed in that paragraph for up to thirty days. In such a case, the head of an administrative organ must promptly notify the disclosure requester in writing of the extended period and the reasons for the extension.