Photo/Illutration Commuters on the morning of July 12 when the fourth state of emergency started in Tokyo (Shiro Nishihata)

Tokyo reported 1,387 new COVID-19 cases on July 20, up 557 from a week ago, the 31st consecutive day of a week-on-week increase, metropolitan health officials said.

The latest figure marked the highest ever for a Tuesday in the capital. 

The seven-day average of new infections over the week through July 20 was 1,180.0, an increase of 49.3 percent from the previous week.

The three-day average of tests performed through July 19 totaled 6,700.7, the officials added.

The number of serious COVID-19 cases requiring ventilators or an extracorporeal membrane oxygenation (ECMO) device, which circulates blood through an artificial lung, remained 60 on July 20, the same as the previous day.

There were two new deaths from the disease in the capital.

Of the new infections, patients in their 20s accounted for 448. They were followed by 300 in their 30s, 234 in their 40s, 179 in their 50s and 78 aged between 10 and 19. Thirty-six patients were 65 or older.