Banana Fish is not based on real events. It's a fictional narrative that takes the reader/viewer into a made-up world with its own unique plot and characters.
Banana Fish is purely fictional. The plot, characters, and events were all imagined by the writer to create an engaging and unique narrative. There's no real-life inspiration behind it.
The Banana Fish anime doesn't fully encompass the entire manga. Certain elements might be missing or adapted differently. However, it does a decent job of presenting the main plot and key characters from the manga.
The ending of the Banana Fish anime aligns with a certain part of the manga. It's around a crucial juncture in the story, where major events unfold and character arcs reach important milestones.