Final answer:
A district
must have at least 50,000 daily train station users to be considered for a KFC location in Japan, based on the concept of threshold population.
Step-by-step explanation:
To be considered for a KFC store location in Japan, a district needs to have at least 50,000 people using its train station every day.
This concept falls under what is known as the threshold population - the minimum number of customers needed to support a business. For comparison, a Wal-Mart store requires a threshold population of about 20,000 people, which is why they are more numerous than major league baseball teams with a threshold population of about two million people.
Starbuck's Coffee shops, with a threshold population of around 5,000 and a smaller range, can be found even more commonly.
The subject of this question is Business.
A shopping mall needs to have at least 50,000 people using its train station every day to be considered for a KFC store location in Japan.
This information is based on the concept of threshold population, where merchants and service providers require a minimum number of customers living within a range to stay in business.