Hoarder house

From a psychiatric perspective, compulsive hoarding (habitually storing items away without using them) is considered an abnormal behavior called an obsessive-compulsive disorder (OCD).

[2][3] It is considered a problem because of the damage it causes to nearby residents due to foul odors, rodents, and insects (especially pests), as well as its susceptibility to crimes such as incipient fire and arson.

[6] In addition, in the case of private property, entry without a valid cause is considered illegal trespassing, which makes the problem more difficult to solve.

Another case occurs when neighbors repeatedly dump garbage illegally in private homes or real estate properties that have been left unoccupied for an extended period while the owner neglects it without taking countermeasures.

In this case, the blame would fall on the lack of morals and illegal behavior of neighborhood residents (most likely a specific few) rather than the owner of the hoarder house.

[8] According to the Mainichi Shimbun survey reported in its October 23, 2016 edition, among a total of 74 cities and the 23 wards of Tokyo, only 16 municipalities (16%) have enacted ordinances for dealing with hoarder houses.