I tried to make it sound more natural in Japanese. If you'd like to know which parts I specifically changed:
Foobar2000 is my favourite audio tagging & player software. However, tagging .wav files can be a bitch indeed; I recommend you to transcode them first to .flac or something. Once they're in .flac, you can have them split to each track instead of merged in big audio files (if you have the proper cue sheets), and they'll be much easier to tag.