The populations of three wards in central Tokyo are projected to keep growing after 2025 even as the capital's overall population is expected to decline, thanks to a construction boom and convenient transport.

Chiyoda, Chuo and Minato wards have seen an influx of families and elderly people, and their populations are expected to continue growing through 2040. This could present the wards with problems in providing adequate child and nursing care.

According to a Tokyo Metropolitan Government estimate, the capital's population is expected to fall after peaking at 13.98 million in 2025. But the populations of the three wards above are expected to rise further and reach a collective total of about 635,000 in 2040, up some 40 percent from January 2017.