It is estimated that there are currently around 150,000 Japanese last names used in Japan today. A list of the top 100 surnames comprise almost one third the population: Common Japanese Surnames
Zoning, the regulation of the use of real property by local government, restricts a particular territory to residential, commercial, industrial, or other uses. The local governing body considers the character of the property as well as its fitness for particular uses.
Theoretically, the primary purpose of zoning is to segregate uses that are thought to be incompatible. In practice, zoning is used to prevent new development from interfereing with existing residents or businesses and to preserve the character of a community.