Using stamps, all types of pens and even nailpaint! I have created 3 different styles of handmade business cards over the last few years. Follow a couple of ideas that I'm about to describe and you'll be DIYing your own unique cards super soon.
Japan is a wonderland for stationery lovers. I did a lot of online research before going and then hunted down every single store on my must-go list. So if you're going to Tokyo, these are my best recommendations, from the most famous to hidden gems, with a lot of photos.