It seems that the problem I am facing now is probably not a problem with font settings.
I copied the text in the Window and pasted it into Notepad, but the character encoding itself was already wrong.
dotnet: .NET ���� Microsoft (R) Build Engine �o�[�W���� 16.7.2+b60ddb6f4
Copyright (C) Microsoft Corporation.All rights reserved.
So I did a search and found the following information, which I believe is the same cause.
I have also experienced that the default character encoding on Windows for Japanese OS is S-JIS, not UTF-8, so if it is run as a console application, the resulting character encoding must be decoded as S-JIS or the character encoding will be destroyed.
Windows environment variable for system
(1) setx DOTNET_CLI_UI_LANGUAGE jp-JP
(2) setx DOTNET_CLI_UI_LANGUAGE ja-JP
With "jp-JP", dotnet output an error and with "ja-JP" did not cause an error, but did not fix the garbling itself.
(Of course, I have restarted the Radzen application in both cases.)
The dotnet application now outputs messages in English, so the problem has been avoided for that time.
I think the problem is still there, so I would appreciate it if you could notify me if it is fixed.