The government will, from this month, start experimenting with using proof of COVID-19 vaccination at restaurants and other places in 13 prefectures after it relaxed restrictions to prevent the spread of the deadly coronavirus.

The experiment, which will also be carried out at sports stadiums, small live music venues and theaters, aims to confirm whether checking visitors' proof of vaccination or negative test results can be conducted smoothly.

It will also verify the procedures for responding to a situation when infections are found after events are held, with measures that include keeping a log of all visitors.