TOKYO — On languid bus rides from one Olympic venue to another, a panorama of gustatory pleasures rolls by: noodle joints, skewer shops, sushi counters. We stare at it all through tinted glass: It is like a mirage of the people we are not meeting, and the food we are not eating. This is all for good reason. Japan is in a state of emergency. Coronavirus cases are on the rise. Unleashing thousands o