Fertility rate: children per woman, 1979 to 2022
ttps://ourworldindata.org/grapher/children-born-per-woman?tab=chart&time=1979..latest&country=CHN~PRK~KOR~JPN~TWN

Birth rate
The number of live births occurring during the year, per 1,000 people.
ttps://ourworldindata.org/grapher/crude-birth-rate?tab=chart®ion=Asia&country=OWID_WRL~CHN~PRK~JPN~TWN~KOR