TOKYO, JAPAN, 2017-Feb-02 — /EPR Retail News/ — Lawson, Inc. and Save On Corp. have signed a mega-franchise contract in Gumma, Tochigi, Niigata, Saitama, and Chiba prefectures. About the mega-franchise agreement: At the end of December 2016, Save On operated 503 SAVE ON convenience stores. Save On has agreed to gradually change the outlets into LAWSON brand…