Japan will secure enough COVID-19 vaccines for all residents age 16 or older by the end of September, vaccine chief Taro Kono said Sunday, as Pfizer has accepted Prime Minister Yoshihide Suga's request to supply additional doses of the shots.

"They have agreed on the essentials of the matter," Kono said during a live interview on Fuji TV, adding that further details including the shipment schedule will be discussed later.

Kono did not specify the number of extra doses sought from Pfizer, but said Japan would secure enough supply by the end of September to inoculate all people over 16 years old.