To download the game client 「真 · 女神 転 生 IMAGINE」 click the [DOWNLOAD] button.
Unzip the archive into the desired folder and run the game through the Updater (ImagineUpdate.exe).
Please download the "DirectX End User Runtime Web Installer" from link below and try again after installation.
At the moment the game is not translated into English. Hence it is all in Japanese.
And so that the text does not look garbage, you need to enable the Japanese locale in the settings of the Updater.
Because full translation into English is not yet available, a partial translation was made based on the last English client of the game. Much of course remains in Japanese, but still.
The game language can be selected in the settings. After choosing a language and downloading new files, restart the Updater.