I Want to Eat Your Pancreas novel author Yoru Sumino recently saw the anime adaptation in advance of its opening in Japan. He posted his mixed review on Twitter, and fellow users praised the creator's honesty. Sumino said:

I saw the Pancreas anime. There are good parts, but honestly there are also unsatisfying parts. Still, Sakura and Kyōko are extremely cute, and I saw how the protagonist pushes forward. From my heart, I'm glad I wrote this story. Also, sumika 's song is just too good. I leave the rest to those who watch it.

The film had a preview screening on July 24 in Tokyo. The film will open in Japan on September 1. Aniplex of America will screen the film in theaters in the United States.

Mahiro Takasugi is voicing the unnamed protagonist, and Lynn is playing the lead female character Sakura Yamauchi.

Shin'ichirō Ushijima is directing the film and writing the script, while Yūichi Oka is the chief animation director and character designer. Hiroko Sebu is composing the music. Studio VOLN ( Idol Incidents , Ushio & Tora ) is producing the animation.

Rock band sumika is performing the theme song "Shunkashūtō" (The Four Seasons) and the opening theme song "Fanfare."

The novel's story is told from the point of view of an unnamed protagonist who happens to find a diary in a hospital one day. The diary belongs to his classmate, a girl named Sakura Yamauchi, who is revealed to be suffering from a terminal illness in her pancreas, and who only has a few months left to live. Sakura explains that the protagonist is the only person apart from her family that knows about her condition. The protagonist promises to keep Sakura's secret. Despite their completely opposite personalities, the protagonist decides to be together with Sakura during her last few months.