Sorry to disappoint but Tsunade doesnt know FTG. Check:
You must be registered for see links
U wld also see it took three regular (Minato is a genius so he can solo it) S class shinobi to perform it and naruto is yet to do a rasengan without a clone (Minato cld do it in one hand only). So even if he learns it it, it wont be much use in normal mode battle and in BM he can already flash move. Perhaps it can be used for escaping and fast travelling. But in SM idk, maybe he can solo it SM.
