Trends in live births by place of delivery: Japan, each prefecture (special wards and specified cities) . 2021 Vital Statistics of Japan [website]. Tokyo: e-stat (Portal Site of Official Statistics of Japan), National Statistics Center [Japan]; 2021 (https://www.e-stat.go.jp/stat-search/files?page=1&layout=datalist&toukei=00450011&tstat=000001028897&cycle=7&year=20200&month=0&tclass1=000001053058&tclass2=000001053061&tclass3=000001053064&stat_infid=000032118535&result_back=1&tclass4val=0, accessed 30 November 2021).