About your keyboard…
One thing you can do is install the proper Japanese keyboard layout in your English Windows XP setup. The Japanese drivers are built into the OS. You can set it in Regional and Language settings. This should make the keyboard be in English but still have the correct keys. You’ll just have to get used to the slightly different placement of a few keys.
I’m afraid I can’t help you with the Bluespace software since the version that comes with the USB Bluetooth adapter is different than the one that ships with the TR1MP or TR1/B. You may want to check with importers like Dynamism, iCube or Kemplar to see if they can help you facilitate getting an English version of the software.