"The new president of the Tokyo Olympic organizing committee stopped short of saying there would be no foreign fans at this year's games, but she certainly hinted at it Wednesday after online talks with IOC President Thomas Bach and others."
Source: https://news.yahoo.com/report-no-fans-abroad-postponed-104736463.html
Update: "The government has decided to exclude overseas spectators from attending this summer's Tokyo Olympics and Paralympics... The government and the Japanese organizing committee of the Summer Games are expected to hold a remote meeting with the International Olympic Committee and two other bodies possibly next week to make a formal decision on the issue of overseas visitors."
Source: https://www.japantimes.co.jp/news/2021/03/10/national/tokyo-olympics-no-fans/