U.S. pharmaceutical company Johnson & Johnson said Monday it had filed for Japanese health ministry approval of its coronavirus vaccine through its local unit.

If approved, the firm said its vaccine could be delivered to Japan in early 2022, becoming the fourth vaccine in the fight against COVID-19 in the country, which is lagging behind other nations in its vaccine rollout.

According to the unit, Janssen Pharmaceutical K.K., its early-stage study results from 250 healthy people between the ages of 20 and 55 and those aged 65 or older in Japan showed that the one-shot vaccine did not pose safety risks.