Board Thread:Theories and Speculation/@comment-890307-20161205161301/@comment-734582-20161214075434

Namikazenaruto9 wrote: tsunade was an senju, whereas uchihas aren't very well known chakra reserve though it would be interesting to see if 100 healing jutsu can be used for balancing SM And yet Tsunade is the one without a Sage Mode.

Uchiha aren't know for their reserves? Not counting Obito and Nagato, Itachi had the second highest reserves of Akatsuki. Only Kisame had more. High reserves isn't a clan-wide thing of theirs, but that doesn't mean they don't or can't have it.