Today saw the weigh in for the bout, which has a limit of 102lbs.
On the scales Koseki was the slightly heavier fighter, coming in a smidge over 101½lb whilst Miyao was 101¼lbs.
Whilst there was just ¼lb separating the two fighters it did seem like Koseki was the much bigger fighter, having several inches in height above her fellow champion, who sported a new hair colour.
The bout will be aired on Fuji TV this coming weekend with both fighters hoping to become the first ever unified Atomweight champion.
Koseki and Miyao finally unify titles!
(Image courtesy of boxingnews.jp)