When the Menji government banned Samurai from openly carrying swords, many resorted to concealed blades disguised as bamboo poles, wooden walking sticks, and human spinal columns, all of which could be carried in public without causing suspicion.
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It got a huge amount of people reading, that hadn't picked up a book in years. By my experience, the audience was generally middle aged women. I knew a lot of them who freely admitted that they hadn't read a book since leaving school.