The article on the Spanish ESPN site states that the two men will fight on December 29th in Nagoya, giving Tanaka home advantage, for the title that was vacated earlier this year by Donnie Nietes, who twice defended the title against Fuentes.
Originally this bout was pencilled in for September though had to be cancelled due to Tanaka not having recovered from a hand injury. Now it seems Tanaka is fine and the bout will go ahead, with CBC and TBS likely to televised the bout live, in Chukyo and Kanto respectively.
For Tanaka the bout sees him fighting in his first world title bout at 108lbs, having previously claimed a title at 105lbs, and defending it once. Although his first defense, a stoppage win against Vic Saludar, saw Tanaka being dropped and being given a serious test there is belief in his camp that the move to 108lbs will bring the best out of him. As for Fuentes the bout sees him fighting in his third title bout at the weight, though he has previously held the WBO interim title.
Notably both men have been out of the ring since the first half of the year, due to the injury of Tanaka's, but with a date set for the bout both will have plenty of time to prepare and get into great shape for this match up, will will come on one of potentially 4 year ending shows for Japanese fans as the calendar begins to fill up.