Rakuten becomes main sponsor of FC Barcelona from the 2017-2018 season   Rakuten will appear on the front of the team jersey and become the Global Innovation and Entertainment Partner for the next four seasons, starting July 1, 2017 Tokyo, 2016-Nov-19 — /EPR Retail News/ — Rakuten, Inc. (TSE: 4755) today (November 16, 2016) announced it has agreed to…