Hi Photographer friends,
I can't speak or read Japanese, but here is a pamphlet (catalog) describing the Pentax K-1 in details. Even if you can't read Japanese, the photos can tell you a whole lot about the camera. You can load "Google translate" and get a rough translation of whatever paragraph you are interested in. The translation is rough, but will be enough for you to grasp the content.
Now, for you Pentax owners, I do have e-books for most of the Pentax DSLRs. You can check this site ebooks4cameras.com and even download any e-book for checking the contents.
Click on the image above to visit our e-book store. You can also download sample e-books and get the free AF front and back focusing adjustment charts at this e-commerce.