if they can show naruto sitting on the toilet, and show jiraiya staring at naked chicks, and (need i add) SEXY NO JUTSU.....then why cant tsunade have big breasts?
im waiting for the anime to match some of the laster scenes in the manga that involve camera shots which make it much more obvious

i think she's using something a little more complicated than henge, but regardless, it would be ninjutsu NOT genjutsu. When enma turned into a diamon staff, he was literally a diamond staff. Henge is NOT genjutsu.