Nakamura married television personality and singer Mari Yaguchi in May 2011. The two had planned to marry in March of that year, but postponed to May due to the Tōhoku earthquake and tsunami. On May 21, 2013, "Josei Seven" reported that Yaguchi and Nakamura had been living apart since late February after Nakamura discovered she was having an extramarital affair with model Kenzo Umeda through used bedsheets and Umeda hiding in the closet naked. In the following days there were more press reports about multiple instances of alleged infidelity by Yaguchi; however, Yaguchi alleged that Nakamura had been physically abusive towards her. On May 30, 2013, the public relations firm for Yaguchi and Nakamura announced that they had submitted their divorce papers.