Kazuto Ioka and Joshua Franco will unify 115 lb titles on New Year’s Eve. The expected Dec. 31 fight between Kazuto Ioka and Joshua Franco is now official, with the two meeting in Tokyo for a pair of junior bantamweight titles. Ioka (29-2, 15 KO) will be defending his WBO belt, while Franco (18-1-2, 8 KO) brings the WBA strap to the matchup. The 33-year-old Ioka, who has somewhat quietly been one of the best fighters of his generation, also has won titles at 105, 108, and 112, and moved up to 115 in 2018, breaking a short retirement. He…