The Tokyo Metropolitan Government reported 1,337 new cases of coronavirus in the Japanese capital on Thursday.
That is the first time the daily tally has risen above 1,000. The figure surpasses the previous high of 949, hit on Saturday, by nearly 400.
The newly-confirmed patients range in age from below ten to over 100.
Tokyo authorities on Thursday also confirmed five new deaths from the virus.
Infections have been rising rapidly in Tokyo, with recent daily rates often exceeding 800.
The total number of people who have tested positive for the coronavirus in Tokyo now stands at 60,177.
Tokyo Governor Koike Yuriko warned on Wednesday that citizens face an unprecedented third wave of infections. She said cases could surge at any time, and urged people to avoid holding parties at home with friends or getting together with groups of relatives.
Koike said infections must be contained over the year-end holidays, and saving lives must be the priority. She warned of a possible state of emergency if the situation worsens.