From WBC:
NOT TO BE TAKEN LIGHTLY! YUKO KUROKI VS. MOMO KOSEKI
On December 17th in Kyuden Gym, Fukuoka, a promised war between two great Japanese champions, Yuko Kuroki, minimumweight champ of the World Boxing Council, defends her belt against the queen of THE WBC Atomweight division Momo Koseki.
This will be the sixth defense of Yuko (17-4-1, 8 KO’S), who conquered the belt in 2014 in Osaka defeating Mari Ando by decision.
Momo (23-2-1, 9 KO’S) won the atomweight belt in 2008 when she defeated Hye-Min Kim.