The government notice, issued under the Number Act’s enforcement rules, allows regulated private‑sector applications to run on the card. This suggests a shift towards a more versatile, platform‑style digital ID. The number of private sector companies that have introduced Japanese Public Key Infrastructure (JPKI) continues to rise, with the number at 892 companies as of January 31. Many companies use the My Number Card’s identity verification functionality, such as for account openings for banks, subscriptions or membership card applications.