Acrobat Reader needs an option to display a pdf with the Japanese reading order.

For example, in a Japanese PDF, when reading a pdf with the "show 2 pages option" and the first one is the cover, page two has to be on the RIGHT and page 3 on the LEFT, and so on. This way you can see the real layout of the pages and can see if you have any problem with images or texts that are placed on both pages.