AFLAC INCORPORATED, AS ISSUER AND THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE EIGHTH SUPPLEMENTAL INDENTURE Dated as of June 10, 2013Aflac Inc • June 12th, 2013 • Accident & health insurance
Company FiledJune 12th, 2013 IndustryTHIS EIGHTH SUPPLEMENTAL INDENTURE (this “Eighth Supplemental Indenture”) is made as of the 10th day of June, 2013, 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”):