Board Thread:Boruto Discussions/@comment-33156423-20170930194448/@comment-734582-20171005211552

Mushibrow wrote: Goes on to show how ridiculous and stupid Boruto as a show is. Yagura was older than he looked. The databook even says so.

Zabuza died at 27, and he was the last of the Blood Mist trials. Meaning that more than 40 years have passed since (3 for timeship, +10 for boruto era). If both Yagura and his child had kids in their early 20's, then it would work just fine.