Japan’s voluntary lockdown
Fig 4
The horizontal axis shows the percentage change in the level of outings from the corresponding value at the baseline, where the level of outings is defined as the difference between the nighttime and the daytime population. The vertical axis shows the measure of “time spent in residential places” extracted from Google’s Community Mobility Reports. Both are the average of daily observations from April 22, 2020 to April 28, 2020.