Saddest Anime

I think a silent voice or Kimi no Suizou wo Tabetai?

Gintama Gintama Gintama Gintama Gintama Gintama Gintama Gintama Gintama Gintama

Violet Evergarden will have you crying every damn ep

Death note
?

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I think that Assasatination Clasroom is sad anime, i recommend you

Anohana is probably my favorite

I cried my eyes out on the last few episodes of Tokyo Magnitude 8.0

JoeJoe's Bizarre Adventure.
specially in part 2 when (spoilers ahead, don't tell me i didn't warned you)

Ceasar died crushed by a cross-shaped stone, shit was real sad.
and then on part 3 when iggy, avdol and kakyoin died, specially iggy. which was the saddest of them.

Your Lie In April and Violet Evergarden for me

Boku dake ga inai machi is the saddest anime I've seen so far, its story grabs you from beginning to end.