On December 31st, it was posted on Yahoo Japan's site that Yumi divorced her husband, whom she had been married to for four years. They were married and had a son, who was born a little over a year ago. She and her now ex-husband had been friends for 7 years before getting married.
This isn't Yumi's first divorced, she was married to Takanori Nishikawa (T.M.Revolution), and the two of them divorced back in 2002.
What I'm most curious about is who now has custody of their son, as the article does not mention it. In any case, I hope Yumi is feeling better since this happened over a month ago, and I hope she has better luck with her marriages in the future.