A samurai should always be prepared for death - whether his own or someone else's.
All my knowledge comes from research.
A lot of my stories are inspired by Japanese folklore or literature or movies: I've done stories based on Kabuki and Noh plays, and on Kurosawa's 'Yojimbo' movies.
There's a long history of anthropomorphic animals in Japanese literature. The so-called 'funny animal scrolls' were the first narratives in Japanese history, and the heroes of many folk tales have animals as their companions.
Kids just don't read any more. They spend much more time with video games. It's just hard to get kids to read anything. Book sales have dropped dramatically, too. I think 90% of the books are bought only by 5% of the US population.
I make my own limits which are drawn according to my own taste.