Quibbilize all you like, but, filthy cities like Jakarta, or Paris
or San Fran are as they are, and, Tokyo is not like that.
Not not not.
What is your point?
The point is there are always people that do not care about cleanliness, or their own negligence towards the environment, they exist in every metropolis no matter how clean the city might be.
The trash they produce will always be someone else's problem because they simply don't give a ****.
I have met a few in my time. They had a good upbringing, some even brought up in wealth, everyone else in the family is clean and 'tidy' to a degree, and then there is that one person who literally never cleans the area around his personal self, where there are dishes in the sink from who knows how many months ago, black mold in the carpet or tile, a toilet bowl black with residue of 1000's oh dumps taken and never cleaned.
Most people are generally clean, even messy folks can be clean, their rooms are in chaos like mine is most of the time but it is not filthy and rancid like a sewer that is built and never maintained a single time. I would say even the lazy ones that don't clean daily reach a threshold that triggers them into cleaning mode. "This is too much I need to do a full scale cleaning operation and then let it slip back slowly to this state."
I think there is something mentally wrong with these folks that allow their personal space to devolve into such a state.
And the point is, they are everywhere Tokyo probably has at minimum 1000-5000 of these particular kinds of people wallowing in filth they care not to actively get rid of.