Hiromi Paper has a great blog piece that explains (in easy language and lots of pics, for non-papermakers like me) about Kozo (mulberry plants) and the papermaking process in Japan during these times. Its a really interesting article and really worth taking a look (especially at the pics- okay, its a busy day today so I was not feeling like lots of reading!) https://hiromipaper.wordpress.com/2020/08/18/letter-from-japan-tesuki-washi-tanino/?goal=0_c52bf674c3-2106473aa8-211072