The Seibu Lions announced today that they reached an agreement with Ernesto Mejia for the 2015 season. No other details have been released by the press at this time.
The following statement was provided to the media by Seibu:
I am honored for the chance to return to the Seibu Lions and to once again hear the warm support from fans. I am excited to again play with my wonderful teammates, coaches, and front office. Thank you, Lions.
Source: official announcement
[UPDATE 10/8 @ 11:09pm]
Mejia left Japan out of Narita Airport on Wednesday. He reportedly agreed to a one-year deal worth an estimated 180 million yen plus incentives (up from the thirty-five million yen he made this year).