The heart is yet another type of origami design. As I explained in my original origami post, origami is the word we use for paper folding regardless of the culture the design is from. The heart is now a universal symbol of affection, in Japan and elsewhere.
The following include a couple of examples of how-to instructions for origami hearts. For blog purposes, they need to be a little small, so… I’m also placing a YouTube video providing detailed instructions. 120,000 views can’t be wrong, so there you go. ^^ – J