People wearing face masks to help curb the spread of the coronavirus walk on Aoyama shopping street in Tokyo Sunday, Dec. 27, 2020. Japan is barring entry of all nonresident foreign nationals as a precaution against a new and potentially more contagious coronavirus variant that has spread across Britain. The Foreign Ministry says the entry ban will start Monday and last through Jan. 31. (Yuka Ando/Kyodo News via AP)(Yuka Ando)