This review may contain spoilers. I can handle the truth.
Help me out here: so in the end Tsugumo does not sell his sword, even if his daughter and grand-son still had a chance to be cured?!
A lot of people are shocked by how fast the creature is forgiven (and loved) after it eats a cat. Get over it: humans eat smart animals too. The creature probably tought all those cats were bred for food, not as pets. Also, those were the 60s, and cats were useless because their pictures could not be posted on the Internet.