Coz I have few Japanese penpals ( by e-mail ), after few times e-mail correspondence, I asked if they have MSN or Skype for fast communication,
I already had two experiences, after asking this question, I didn't get any reply , another one replied say she didn't want to be bothered by MSN then I replied it is ok to keep in touch by e-mail..but also did not get reply anymore....

I do have Japanese friends use MSN tho.....