AFLAC INCORPORATED, AS ISSUER AND THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE FIRST SUPPLEMENTAL INDENTURE Dated as of September 26, 2012Aflac Inc • October 1st, 2012 • Accident & health insurance
Company FiledOctober 1st, 2012 IndustryTHIS FIRST SUPPLEMENTAL INDENTURE (this “First Supplemental Indenture”) is made as of the 26th day of September, 2012, by and between AFLAC INCORPORATED, a Georgia corporation, as issuer (the “Company”), and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., a national banking association, as trustee (the “Trustee”):