1R/1K studio apartments can range from as little as 12 m² of space (often with a loft) to as much as 30 or 40 m² of space on the more expensive end. On average, a 1R unit in Tokyo and Yokohama is about 16 m² to 22 m², has a 3-piece unit bath, and may have a separate cooking space. 

A typical tenant is a student or young professional who has just graduated from school and wants to minimize housing costs to focus on other priorities whether that be a new car, saving for a new home upon marriage, etc.

Buyers of this type of property may be a parent looking to provide housing for an adult child going to school are just starting out in a new career. After the child has moved out, the owner will either become a landlord and rent the property out for generating passive income or sell the property outright.