Katana's are weak on the flat side. They aren't really meant to be used for parrying. In fact, most sword fights in Japan would be over after the first or second swing. It was commonplace to hold the grip of a katana but not draw it in such a way so that your enemy has trouble judging how long your katana is and what is a safe distance to be from you. Once your opponent is in range, draw it quickly and kill them in one blow, ideally.
The act of killing your opponent in a single blow is called "nukitsuke" from "nukiuchi" meaning "to cut down an opponent" and "tsuke" meaning "to stop an opponent's attack before it begins".
The Sekiro and popular media image of extended katana fights didn't really happen, but if they did, there would almost certainly be some broken katanas.
In the early 2000s I had just come out as a transgender woman and the world was much more hostile towards trans people back then. I was hanging out with some friends in Toronto at a New Years Eve party and I had to use the washroom sooo badly but there were like hundreds of people around the entrances. It was my first time ever using a public washroom as a woman, and it couldn't have been more public.
I ended up chickening out and peeing in an alley later out of desperation. It sucked big time.