It operates daily flights.
Japan has been allowing tourists from Vietnam since last month, with those having got a third dose of a Pfizer, AstraZeneca, Moderna, Janssen, Bharat Biotech, or Nonavax vaccine not requiring to test for Covid before or after entry.
Japan began a phased reopening in June, initially allowing in visitors from 98 countries and territories, not including Vietnam.
Vietnam reopened its borders in mid-March after two years of closures and reinstituted its visa waiver for Japanese nationals.