Table 1.

Exportation events and estimated incidence in Hokkaido by date of report.

Case Number	Diagnosis Location	Date of Illness Onset	Date of Report	Cumulative Count	Estimated Incidence in Hokkaido (95% CI)
1	Kumamoto	15 February 2020	22 February 2020	2	24 (4–74)
2	Chiba	16 February 2020
3	Nagano	20 February 2020	25 February 2020	3	36 (9–93)
4–5	Thailand	20 February 2020	26 February 2020	6	3446 (857–8931) # 2298 (382–7091) ##
		NA
6	Malaysia	25 February 2020	27 February 2020

CI, confidence interval (the 95% CI was derived from profile likelihood); NA, not available. The estimated incidence is updated by the function of the date of report. The estimated incidence for the latest available reporting date (27 February 2020) depends on whether both cases 4 and 5 acquired their infection in Hokkaido (^#) or whether one was infected by the other (^##).