Tokyo on Saturday kicked off a 20-day period during which restaurants that serve alcohol and karaoke venues have been asked by the metropolitan government to shorten business hours to help combat a recent resurgence of coronavirus infections.

The request comes two months after the lifting of a similar call and as the country the same day logged a daily figure of 2,684 new coronavirus cases and 440 cases of those with serious symptoms, both at record levels, further raising concerns about the severity of the virus.

The move comes as a blow to operators hoping for increased demand during the year-end party season and could derail the Japanese economy's nascent recovery.