In traditional Japanese homes, there is a "genkan" which is a room like a porch with a doormat.
In Japanese schools, when you come to school, you change to the indoor shoes.These are for boys and girls. If you go to recess, you change your shoes to the outdoor ones.
In some Japanese restaurants, they sit on the floor and eat the food on low tables. Of course you will have already taken off your shoes. NO slippers provided.