Installing New Japanese Fonts

As a major in East Asian Studies, I have been using the Japanese input (by configuring "international") for about two years. This afternoon, I was working on a powerpoint presentation in for my Japanese class and I decided to spruce it up by downloading some cool Japanese fonts. A few of the fonts I downloaded were from this site.

I installed these fonts and successfully verified them. When I try to find them in my font list in Powerpoint or Microsoft Word, they're not there. Is there something special I need to do to get those programs to recognize these fonts?

I tried to access these fonts with Photoshop, which was successful. When I tried to use the "hiragana" input, the font switched back to the default Japanese font on my computer. What do I do so that I can use the "hiragana" input to write in Japanese with the new fonts?