Ninjas love scrolls. It’s just a ninja thing, don’t ask. They refuse to read anything that hasn’t first been rolled up into scroll form so they can unroll it again and dramatically ponder its contents. Luckily for us, they left a few of these scrolls behind. In the interest of important ninja science, I took a look at some translations of these aged texts, such as the Bansenshukai, the Koka Ryu Ninjutsu Densho, the Shinobi Hiden, and the Yoshimori Hyakushu to find out whether any of Sekiro’s tools, items, and techniques have much historical precedent. And they definitely do. Allow me to impart this secret knowledge* upon you.
* It’s all on Kindle