Japan signs final agreement with AstraZeneca for supply of 120 million doses of coronavirus vaccine

The latest on the vaccine front

That puts Japan in good stead one there is a mass rollout of the vaccine in the future. Japan also has a deal in place with Pfizer for 120 million doses of its vaccine as well.
Getting the supply is the first step, so at least they are nearing that stage. The implementation and getting the shots to everyone though, will still take some time.