Koyuki announced the birth of her second child with Matsuyama Kenichi on 10 January through a fax statement sent by her agency. In the statement, she revealed that their daughter was born on the same day and expressed joy at welcoming the arrival of their new family member. Matsuyama was able to witness the birth of their daughter as it happened to be his off-day from rehearsals for his play "Tooi Natsu no Gogh". The couple's first son was born on 5 January last year which makes both their children January babies.
Source: Sponichi Annex doramaworld