On August 21, 2015, Ubukata allegedly hit his then-wife in her jaw and mouth area at their home in Aoyama, Minato Ward of Tokyo, breaking her front tooth. She reported the incident to the police the next day, leading to his arrest on August 24, 2015. Ubukata admitted they had an argument but denied hitting her.
On August 21, 2015, Ubukata allegedly assaulted his wife at their home in Aoyama, Tokyo, causing a broken tooth. She reported the incident to the police the next day, leading to his arrest on August 24, 2015.