The Tokyo Metropolitan Government reported 816 new cases of the coronavirus in the Japanese capital on Sunday.
That's the highest number for a Sunday in Tokyo.
Officials also say the number of seriously ill patients has reached 101, up seven from Saturday.
It's the first time the number of seriously ill patients has surpassed 100 since the state of emergency was lifted in May.
The total number of people who have tested positive for the coronavirus in the capital now stands at 62,590.