F-ism is a series of CD's published by 村上水軍, where the primary focus have been bondage arts, but some times includes general arts, wall paper, and calendars. There are, to-date, 13 volumes (discs) that I am aware of which was sold.
Each disc contains an auto run application which loads the HTML pages that offers some categories, generally: Information, Gallery, Free Talk, Link to his webpage, and email. Under the gallery section, there's usually "F-ism", "Color" and "Rough". In some volumes, PSDs are included with the disc.
The images raised by Washii in the first post are from the color section of Volume 11.
I'd like to argue that due to the quantity of the images available, the tag "F-ism" (or more "fism" as we have right now) should stay. Relevant comparison would be putting all CGs drawn by one artist (regardless of the source) into one single pool. It would be relevant if we pool the images into individual volumes, though.