Institutional Birth (IB): includes all deliveries that occurred at a health facility. Trends in live births by place of delivery: Japan, urban/rural residence. 2017 Vital Statistics of Japan [website]. Tokyo: e-stat (Portal Site of Official Statistics of Japan), National Statistics Center [Japan]; 2018 (https://www.e-stat.go.jp/en/stat-search/files?page=1&query=live%20births%20by%20place&layout=dataset&year=20170&stat_infid=000031743390, accessed 19 September 2018).