NHK (Japan Broadcasting Corporation) has released the statistics of a data analysis conducted using the data of over 9800 infected cases in Japan, as reported by the local governments of each prefecture.
WA.SA.Bi. has summarized the main points and would like to share them with you!

Source (Japanese): https://www3.nhk.or.jp/news/special/coronavirus/analysis/?fbclid=IwAR2eSv-MFVAE3TjyQ_F3IdD1Q5GL6uSJgPAtnXwoCCDaeBwHNeWFXvRlS1Y