Answer:

Many multi–storied dwellings such as condominiums began to be built in the latter 1950s. With the change in the industrial structure, people streamed into cities from the farming areas causing a sharp rise in the city population. Land prices skyrocketed and condominiums grew in popularity because of the difficulty in acquiring a single–family house.

However, condominiums in Japan cannot be said to be spacious. Most of the units are 50 m² to 100 m² (164 to 328 sq. ft.) in area.

Sound insulation between houses in inadequate and sound is easily carried from the neighboring houses as well as from the top and bottom units. This type of living arrangement is enough to make anyone dislike pets. They feel they need not put up with barking dogs or the meow of a visiting cat on a windowsill.

This no–pet policy is not enforced solely in Japan. There are condominiums in the West too, that ban pets.

There is no end to the trouble caused by droppings left around the condominiums area by pets being taken on a walk. In cities in other countries, it is rare to see animal owners carrying a plastic bag and a trowel to clean up after their pets, and this problem has continued to vex the city authorities. On this point, animal lovers in Japan may be the better rule observer.