Slightly on-topic, slightly off. [Fujimoto’s Five Books are public domain](https://origami.kosmulski.org/blog/2022-10-23-fujimoto-books-public-domain). The text is in Japanese, so you might (I will) be using them as reading practice. I might even fold some of his designs.
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Oh no it’s my archnemesis – hand-written kanji.
As an origami fiend, thank you very much for sharing the resource!