Hiroshi Mikitani, the owner of the Rakuten Golden Eagles, is apparently a little taken aback by the claim from the Red Sox that they are world champions. Given that Major League Baseball teams are based in only two countries, it is admittedly difficult to claim such an international prize as the title "world champions" implies. And since Mikitani's Golden Eages won the Japan Series earlier this year, he feels that the two champions should meet to decide the rightful world champion.
That said, there is precedent. In early 2006, the then-World Series champion Chicago White Sox took on the Japan Series champion Chiba Lotte Marines (managed by a man infamously familiar to Red Sox fans). The White Sox swept aside the Marines, despite some pre-series boasting from Bobby V.
http://bostinno.streetwise.co/2013/12/10/owner-of-japanese-champions-wants-to-challenge-red-sox/
Let's be honest, this would be a lot more exciting than the World Baseball Classic. It's probably not possible now that members of the Red Sox have signed elsewhere. But how great would this be for baseball and the two cities?