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I bring this to your attention, Microsoft offers something for Windows which allows you to switch the charector sets and write in it, so if you are really wanting to do the japanese charectors they can be done with this the following:
IME Language ThiNGy [microsoft.com]
Once you have the languages installed which can be downloaded for free then you can compose the pages, make sure you have the charector-set thingy set to the proper languages.
Would this work ? Just a thought in the dark :)