Happily using the IME facility/Japanese keyboard to type Hiragana/katakana but decided to expand beyond the standard installed fonts for the Japanese language.
I like the look of 'Teacher_K':
http://www.ffonts.net/RPG-KATAKANA.font.download
Downloaded it and placed the fonts into the C:\windows\fonts folder.
Started Word 2010. On a blank page, I right-clicked and chose 'Font'. In the 'Font' tab, there are two drop-downs, 'Asian text font' and 'Font'. I chose 'Teacher_K' that was listed only in the second drop-down. The preview did show my selected font. I clicked 'Set As Default'...OK....
I noticed that on a blank page, my default font was MS Mincho (Body). I scrolled down and chose 'Teacher_K' but when I started to type in Japanese, the font 'defaulted' back to MS Mincho (Body).
Can someone tell me where I am going wrong with my font installation.