In a show of remarkable population growth, the artificial island in Fukuoka, Japan, has reported an astounding 46-fold increase in inhabitants over a period of 20 years. This city within a city, constructed entirely on man-made landmass, has been a hub of increasing attraction for residents due to its strategic location and increasing development. The sudden rise in population presents both challenges and opportunities for urban planning, infrastructure, and social services.

In Japan, where overall population aging and decline are a nationwide concern, such a rise in population in an urban area like Fukuoka brings both attention and concern. Japan places a high emphasis on urban planning and infrastructure efficiency, and these figures will significantly impact future planning strategies.

In the US or EU, there are also instances of sudden population growth due to urbanization and infrastructural investments. Cities such as Dubai and Las Vegas serve as examples. However, the scale and speed of development are usually tied to factors such as immigration, economic opportunity, and policy changes, in addition to infrastructure development.