We have some data: looking at Google Covid-19 Community Mobility Reports, here are the numbers for (Japan, California, US) compared to baseline: Retail & recre

We have some data: looking at Google Covid-19 Community Mobility Reports, here are the numbers for (Japan, California, US) compared to baseline: Retail & recreation: (-40%, -47%, -30%) Grocery & pharmacy: (-12%, -7%, -3%) Parks: (-52%, -14%, +32%) (yes that's a positive sign!) Transit stations: (-55%, -41%, -34%) Workplaces: (-23%, -27%, -24%) Residential: (+14%, +12%, +9%) So this data more or less seems to confirm what you said, though with obvious caveats (e.g. looking at say county-level may overturn some of this: compliance in Tokyo may be less than in San Francisco county and about as good as Santa Clara county, along some dimensions).