If #covid19 has asymptomatic transmission then the only thing we can do cut the chance of exposure with masks and general avoidance with people. Respiratory exhalation (talking and singing) seems to increase likelihood of transmission.
Japan is a culture where talking (socialising) seems far lower than the West, and could be one reason for lower transmission rates. Certainly, physical contact is not the cultural norm. I doubt I would physical come into contact more than once a day with people I live or work with. This is a cultural thing not an expression thing. Love or any other expressions of feeling are done in other ways.