WirelesswatchJapan pointed me to this cool service which allows users to access email via their keitai phones in Japan. The trick is that you can supposedly read email from other accounts (like my kanai.net email) in addition to the email that you get when you sign up with the mobile provider. This is great because I don't want to add another email address to my list and I want to promote only one to my friends and family. I hope this works well!
That would come in handy as I have numerous email accounts and am constantly travelling without net access.