ok for those who are still confused, the japanese MFK books are NOT related to the MFK site (which i assume you meant this forum). This forum just chose the same name, thats all.
The MFK books have been around for a number of years and are up to volume 8 now and are written in japanese because
they are Japanese books written/photographed/edited/published (well you get the idea) in Japan for the Japanese market. But since the contents (photos) are so awesome that people outside japan also want them and so import them from japan, even though many can't understand the text...but who cares