In a Grove has been repeatedly adapted into films, including:
- Rashomon - Japan 1950, directed by Akira Kurosawa
- The Outrage - US 1964, directed by Martin Ritt
- Iron Maze - US 1987, directed by Hiroaki Yoshida
- In a Grove - Japan 1996, directed by Hisayasu Satō
- Misty - Japan 1997, directed by Kenki Saegusa
- The Outrage - Thailand 2011, directed by M.L. Pundhevanop Dhewakul
- The Bottomless Bag - Russia 2017, directed by Rustam Khamdamov
The story was adapted into an opera titled Rashomon: The Opera (1995–99) by Alejandro Viñao.[9] It also served, together with two other stories by Akutagawa, as the basis for Michael John LaChiusa's musical See What I Wanna See.
In 2012, Spanish author and illustrator Víctor Santos combined In a Grove, Rashomon (the other Ryūnosuke Akutagawa short story which the 1950 film was named after), and the legend of the forty-seven rōnin into one graphic novel adaptation titled Rashomon: A Commissioner Heigo Kobayashi Case. The first part of the graphic novel, Rashomon, faithfully retells In a Grove, with protagonist Commissioner Heigo Kobayashi investigating the death of the samurai Takejiro Kanazawa by interrogating the witnesses (including the victim's mother-in-law who had been adapted out of the film version), the prime suspect Tajōmaru, the victim's widow, and Kanazawa through the medium. The section ends with Kobayashi unable to determine who and what had killed the samurai, whose widow remarries by becoming Kira Kozukenosuke's second wife, and Tajōmaru being executed soon after the investigation. The second part of the graphic novel, Seppuku, takes place three years later with Kobayashi now investigating the aftermath of Kozukenosuke's death at the hands of Asano Naganomi's forty-seven loyal rōnin. Rashomon: A Commissioner Heigo Kobayashi Case was first published in Spanish in 2012, with the English version published by Dark Horse Comics in 2017.[10]
