The number of births in Japan in 2024 is likely to fall under 700,000 for the first time after government data show that the figure in the first half fell 6.3 percent from a year earlier to 329,998.
If women had on average 1.5 children it would still take about 1000 years before the population was reduced to just a million humans (the number of humans around 10,000BCE). We're not going anywhere soon.