This looks like an interesting option I did not think of. Can anyone upload there? If so, I'll upload them myself. I was mostly aware of the Internet Archive and did not think of archive.org when it comes to books.
Unfortunately, paper versions are currently very hard to obtain. The last reprint was in 2007 (Twist Origami 1-3, and Introduction to Creative Playing with Origami), and the volumes were too little to match growing interest. When starting this project a year ago, I already had most of the books, but getting those I didn't own was very difficult. The copy of Solid Origami I grabbed was - I believe - literally the last copy I could find on the English-speaking internet. I grabbed it from Kim's Crane (https://kimscrane.com/) and I think they had a copy or two of Fujimoto's other books at the time.
If there is an origami society in your country, they may have some of these books in their library (rules for lending may vary, of course).
These books being so difficult to find was one of the reasons I wanted to ask Fujimoto's heirs to release the books to the Public Domain.
Not yet, unfortunately, since I don't speak Japanese myself. Google lens helps with some segments but produces garbage for others. These books are not the most approachable and many sections do require some background in geometric folding. Hopefully, with the books being PD now, we'll be able to get help and make them more accessible to everyone. Meanwhile, you can find links to instructions for a few Fujimoto's works scattered around the web (on youtube, on my web page at https://origami.kosmulski.org/ and other places).
The shake of the forming wire does help align the fibers in cross-direction, but the effectiveness of this is smaller than all the other effects combined, which align the fibers parallel to machine direction. So, overall, the process reduces the alignment to machine direction somewhat, but does not change it enough to make cross-direction dominant. So, everything makes sense: toilet paper is a long band, grain is aligned with machine direction (the long side of the band, perpendicular to perforation), and that's why it tends to tear "the wrong way". It was exactly the same with the paper towel whose picture is shown in the post.
