So, I went and bought myself a Kobo today. I only installed the dicthtml-ja.zip one so far, but it's working great! My wife's been repeating "sugoooooi" for 10 minutes! Kudos to you, sir. Many thanks
Now to figure out some minor things like how to get the reader to display the title in the library view and be able to turn page by swiping from right to left, japanese style, but I'm sure I'll find that out by myself