@bullcom are they not in your account portal? 

Also some of these don't have it for Japanese or it's part of the software as a whole. Example Revit there is only 1 download and you can pick the language.

https://help.autodesk.com/view/RVT/2024/ENU/?guid=GUID-BD09C1B4-5520-475D-BE7E-773642EEBD6C