calligraphy, two ways (Japan)

This postcard features calligraphy in two styles. On the right is a style that I find completely illegible. It’s so artistic and beautiful that I think it must take significant training and concentration to even read it, much less produce it! On the right is a much clearer style of writing, although there are a few words that I’d have a hard time reproducing myself (I have no idea what it says, of course).