Not true for Japan.
Vax clinics for non-healthcare workers just opened this week. Almost no one is vaccinated and even among HC workers, huge percentages of them declined the vax when they were eligible. They are hoping to get over 65s done by late July. The HC systems is in collapse in many places (ex: Osaka). Many people are simply sent home and die at home. This month a man died in an ambulance after every hospital the crew called declined to take him. Several hotels have been taken over to house covid patients too sick to go home but for whom there are no hospital beds. There are citizen groups petitioning not to hold the Olympics and Asahi Shimbun (a major paper AND an Olympic sponsor) came out this week saying holding them is irresponsible.
Thereās just a HUGE penalty clause if the host country cancels so they are holding out hoping the IOC does the right thing - which they never do, so here we are.