Japanese Population 2024. The current population of japan is 123,658,971 based on projections of the latest united nations data.  — the number of babies born in japan, as well as to japanese citizens residing overseas, fell 5.7 percent in the january to june period from a year earlier to a record.

 — the number of babies born in japan, as well as to japanese citizens residing overseas, fell 5.7 percent in the january to june period from a year earlier to a record.  — aug 31, 2024 the number of babies born in japan in the january to june period decreased 5.7% from a year before to 350,074, hitting a record low for the first half, the.