On April 11, 2017, Watabe married
fashion model and actress
Nozomi Sasaki, who is sixteen years younger than him. Sasaki gave birth to their first child, a son, in September 13, 2018. In June 2020,
Shūkan Bunshun published allegations that Watabe had been involved in extramarital affairs throughout their relationship, some of which involved secret meetings at
accessible toilet restrooms in
Roppongi Hills, and for which he would pay his partner 10,000 yen in cash. Watabe admitted to the relationships and apologized for his behavior, cancelling several of his public appearances.{{Cite web |last=Master |first=Blaster |date=2020-12-04 |title=Japanese comedian apologizes for his many “multipurpose toilet affairs” |url=https://soranews24.com/2020/12/05/japanese-comedian-apologizes-for-his-many-multipurpose-toilet-affairs/ |access-date=2023-08-05 ==Filmography==