adding facility for text processing in japanese

I’m currently running Libre Office ver. on a laptop with Ubuntu as operating system; and this has the facility to enter text in Japanese using SCIM. I also have a laptop and a notebook both running Windows 10, and with LibreOffice I’d like the facility for Japanese text entry, preferably on both (the notebook is a little short of memory). Can someone help me to do this?

Will this help (or give a clue?): Japanese input in LibreOffice.