In order to ensure that an adequate level of data protection is guaranteed also in practice, an independent supervisory authority tasked with powers to monitor and enforce compliance with the data protection rules should be in place. This authority should act with complete independence and impartiality in performing its duties and exercising its powers.

The powers of the PPC, which it exercises in full independence (58), are mainly provided for in Articles 40, 41 and 42 of the APPI. Under Article 40, the PPC may request PIHBOs to report or submit documents on processing operations and may also carry out inspections, both on-site and of books or other documents. To the extent necessary to enforce the APPI, the PPC may also provide PIHBOs with guidance or advice as regards the handling of personal information. The PPC has already made use of this power under Article 41 APPI by addressing guidance to Facebook, following the Facebook/Cambridge Analytica revelations.

According to the information received, the MOD collects (electronic) information on the basis of the MOD Establishment Act. Pursuant to its Article 3, the mission of the MOD is to manage and operate the military forces and "to conduct such affairs as related thereto in order to secure national peace and independence, and the safety of the nation." Article 4(4) provides that the MOD shall have jurisdiction over the "defence and guard", over the actions to be taken by the Self-Defence Forces as well as over the deployment of the military forces, including the collection of information necessary to conduct those affairs. It only has authority to collect (electronic) information from business operators through voluntary cooperation.