Switzerland outside the massive amount of graffiti , it was the cleanest place I’ve ever been

Well Tokyo is huge. But e.g. shibuya isn't that niche and I walked on a sticky ground through broken glass there.

Tokyo is mostly clean. I am not saying that it is dirty.

I am saying, in Japan, seeing trash bag on the street is not usual (for collection usually) and e.g. Tokyo CAN be nasty.