The famous letter scene in Episode 22 is not a twist. The lie was always transparent to the audience. Its power is in the timing . Kaori waits until her hands can no longer hold a bow to confess. She writes:
The word applies here in two devastating layers: Again -Your Lie in April-
If you have not seen Your Lie in April , brace yourself. You will cry. You may throw your remote. You will definitely curse the writers. But do not skip the ending. Do not fast-forward through the letter. The famous letter scene in Episode 22 is not a twist