I'm not Japanese, but I love to work with Asian prints and have several books on Japanese quilts. Interestingly, many of the "Japanese" blocks are actually just simple blocks that take on a different look when used with certain color combinations or prints. Every one of the blocks in your example is a variation on a rail fence block with either 3 or 5 rails. Several members of my family made quilts from my FIL's shirts after he died and we all used a Japanese pattern (he lived in Japan for 3 years) that is nothing more than a very simple version of a log cabin. Simple and beautiful.