In the centre of Tokyo, there is always a lively atmosphere because there are many offices and commercial facilities and a lot of people come to work and go shopping in the city.
In recent years, the number of residents has been rapidly increasing and it is becoming more active for day-to-day consumption. The graph below shows Population Trends in the three central wards of Tokyo (Chiyoda, Chuo and Minato). The graph is based on the rate of change of population from 2002 to 2015 (Each year is based on October 1st). The total population of Japan was 127,110,000 in 2015, in comparison to 127,480,000 in 2002, which is an 0.29% decrease (375,776 people).
However the three wards of central Tokyo (Chiyoda, Chuo and Minato) have quite different circumstances. In Chiyoda ward the population increased by 46%, (39,928→58,457), in Chuo ward by 66%, (85,360→141,750)and in Minato ward by 49% (163,777→243,904). The graph shows the significant increase over the last 13 years. The main factors are the large supply of apartments at a reasonable cost, combined with every convenience and a well-equipped urban infrastructure.
You can see the lively atmosphere in the centre of Tokyo by viewing this significant population transition. The number of people will be continuously increasing up to the Olympics and Paralympics in 2020 in Tokyo.