For more on the topic of tyewriters in non-alphabetic languages, I recommend The Chinese Typewriter (https://mitpress.mit.edu/books/chinese-typewriter) from MIT Press.
An odd but interesting related book is Unger’s _Fifth Generation Fallacy_. If you ignore the dubious framing about 1980s Japanese AI, there’s a long discussion of kanji text entry (including computer text entry) with some kanji-specific references that _Chinese Typewriter_ necessarily skips.