As we already know, there are some conditions that may require you to change the region, for example downloading applications that are only limited to the US such as Windows Subsystem for Android for example.
Although of course this is one of the problems especially because there are some applications that are released limited to certain regions, but we can still outsmart this by changing the region from Windows 11 itself.
Now about this, here WinPoin summarizes the short steps on How to Change Region in Windows 11.
Step 1. First please open Settings > Time & language.
Step 2. On that page, please click Regions.
Step 3. Next, please choose Country or region be the country / region you want, for example Japan.
If you have selected, make sure you reboot the PC to get the changes. That’s it!
Good luck and hopefully useful guys.