[July 1, 2025 In relation to transfer of Yu ID to Japan Post] Q. Can I log in to all the apps and websites of the Japan Post Group using the Yu ID?

Only if the service allows the use of the Yu ID.
For details, please refer to the website that introduces the Yu ID.

＜Yu ID introduction website＞
https://lp.jpid.pf.japanpost.jp/