That's too bad. Makes you wonder if they shouldn't cancel or delay for another year (with a reset to the timing of the games that follow) while the vaccines get rolled out and we see how much normalcy can be regained.
Japan isn't even currently granting long-term work visas for professionals who will contribute to the economy for multiple years, ostensibly to curb spread of the virus. Consequently, it's a bit silly that they will soon be allowing tens of thousands of Olympic employees and athletes to enter the country, who will all be exempt from the standard quarantine procedure.
People are still able to move to Japan and visas are being granted. There's just a 2 week quarantine when people arrive.
However, on December 28, due to rising case numbers, Japan declared another national state of emergency and stopped issuing new visas. My partner has a job offer in Japan, but is currently unable to join me / start work due to the stoppage of new visas.