A user from IMDB forum, fireinthewronghole , made a great explanation about Byousoku 5CM ending. An excerpt from the last paragraph that sum it: So because of the song, we can interpret their meeting at the train tracks as either real or imaginary. It’s possible, like the song implies, that Takaki simply sees Akari wherever he goes. Either way though, the meeting itself is a test of sorts for Takaki and it was meant to completely summarize their whole relationship in one simple but poignant scene. Again, the train tracks and the trains themsevles--being separated by the tracks and the time it takes waiting for the train to pass--is symbolic of the spatial and temporal distance created between the two and how after the trains have passed, Takaki is still left waiting while Akari has moved on. Takaki accepts this, smiles, and walks away as well, showing how he acknowledges that it’s time for him to move on as well. This is what I call a Romanticism ending and I thi...
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