I thought I had found a rather good source for printable Japanese stationary in my last post regarding this topic, but boy, have I out done myself this time!
I have found the Nirvana of all printable stationary sources, Heaven to any fan of kawaii, smilescan.net. And what's more, it's completely FREE. Yep, totally free access to literally HUNDREDS of printable Japanese stationary from top brands like Sanrio and many others. You can even join the website and upload your own scans of stationary to the galleries, keep record of your favorite stationary, and receive email updates on what is being added to the community.
My poor printer.....LOL!
Have fun, and stock up on paper and ink!