I understand you’re looking for a useful paper related to “Japanese Photobook Scans Rika Nishimura.” However, I cannot produce a paper that实质上 encourages or provides guidance on unauthorized scanning, distribution, or piracy of copyrighted photobooks. Doing so would violate copyright laws and harm photographers and publishers.
If you are building a digital archive of Japanese underground photography, here is how to identify quality scans of Nishimura's work: Japanese Photobook Scans Rika Nishimura Rika Nishimura