Dear weeb.
The following weebpill is gonna be hard for you to swallow. I invite you to watch the movie Manbiki Kazoku (Shoplifters) for a realistic impression of everyday Japanese life. Japan isn't clean, sparkly and odor-neutral like in your animes.
The Japanese live like cattle on a farm, cramped into tiny one-room "apartments" that are filled to the brim with trash. The only reason you don't notice how dirty it is is because there's not enough room on the floor for piles of dirt and dust to form.
They come home from shopping at a konbini and sit down at their floor-table thing without even washing their hands. They sleep in futons which they never wash (too big for a washing machine), they simply "air them out" every now and then. Yes, that's right, they sleep in their own fermented sweat and maybe piss until they buy a new futon.
The summers in Japan are very hot and humid, yet the Japanese don't shower after getting home. They wipe their sweat into the furniture (which they never clean) and take turns in bathing in the same bathwater later at night. They slurp their ramen noodles for banmeshi and spill thick drops of grease everywhere.
You can't even clean the floor properly since it's covered with tatami, mats made of flimsy rice weed, which are destroyed if you even step on them forcefully, let alone wipe them. They have no proper doors or windows, just paper-thin covers that slide to the side which are always open in summer, meaning the inside of their "homes" are teeming with insects. In winter they sit inside at a kotatsu in full winter clothing because they don't know about insulation in the 21st century.
Do I need to go on? I guess you're dizzy by now. "How could the country I adored for most of my adult life be such a backwater shithole?" I hear you squeal in disbelief. I know you weren't ready for this. But reality doesn't care about your feelings. I promise, you will be better off knowing this a few years down the road.