To put it into perspective: Cinemas in Japan are chill, it’s not like American or “Western” cinemas where people shout aloud at hyped scenes or laugh so loud where you can’t even hear what the dialog is or talk amongst themselves causing distractions (or yet, using their phone at max brightness that becomes distracting towards other viewers).
Instead: it’s more on immersing to a movie at your own desire, everyone for the most part is dead silent because they know that they are inside a cinema as courtesy is considered, while I’ve heard that is starting or has already started to decline in the US (& Western nations) since the experience of being in a theater isn’t the same as it used to be.
I’m in the UK and only once have I been in a cinema where people were shouting the things. It was some pretty mediocre horror thing and there were some teenagers shouting jokes but it was only like two times. The cinema was pretty much empty and it was just us and them; I think they just found the film a bit boring (we certainly did).