So, how do you get alternative language keyboards to work?

I have been able to get my Japanese typing to work in the past but only once, on accident... However, I have never been able to repeat this... Can you help me?

The following two pages have a pretty solid explanation on how to set your keyboard to Japanese:

Installing IME and Typing Japanese on Windows

Reddit: To those that wise to type in Japanese

ありがとうございました。