To open an ISO you can use MagicISO, or any other suitable application. Once you see the files, extract them to a folder. Not sure, but maybe you can do that with WinRAR as well. Then you can...

Microsoft Tech Bench is an official site to download Windows 10 ISO (click link to open). While attempting an upgrade from the Get Windows 10 (GTX) utility, it will check your devices. If it cannot...

Judging from the problem the original poster had, yes. But there should be a workaround... Why don't you download the Japanese version of Windows from Microsoft Tech Bench and clean-install it? Your...

Then the installer checks the language version and blocks installation. There is no compatibility issue involved, they simply do that because they don't want software designed for Japan to be used...

Well, if I'm not wrong, installing the Japanese Language Pack should also enable the greater Unicode range and complex writing, right-to-left, top-to-down, so there should not be a problem. And I...

Have you tried to load the Japanese Language Pack (Control Panel -> Languages, Add Language), set your time/date settings to Japanese and your region to Japan? I think this last one, your region, is...