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Dai Gyakuten Saiban: Naruhodō Ryūnosuke no Bōken (大逆転裁判 -成歩堂龍ノ介の冒險-; lit. "Great Turnabout Trial: The Adventures of Ryūnosuke Naruhodō", Official English is The Great Ace Attorney: Adventures) is an adventure game in the Ace Attorney series, developed and published by Capcom. It was directed and produced by Shu Takumi and Shintaro Kojima, respectively. The game was released for the Nintendo 3DS in Japan in July 2015, with Android and iOS versions following in August 2017. A sequel, The Great Ace Attorney 2: The Resolve of Ryūnosuke Naruhodō, was released in 2017. The Official English version was released in July 27, 2021, and Sherlock Holmes became Herlock Sholmes.


Case 1 - The Adventure of the Great Departure

Near the End of the 19th century, Imperial Yumei University student Ryunosuke Naruhodo is accused of the murder of John H. Wilson. The Japanese government organises a closed trial in the Supreme Court of Judicature in order not to jeopardise relations with the British Empire. Through the help of fellow student Kazuma Asogi, Imperial Yumei University professor Mikotoba and his daughter Susato Mikotoba, as well as Naruhodo's blossoming expertise in his legal defence, Naruhodo is found innocent and the true culprit is arrested.

Case 2 - The Adventure of the Unbreakable Speckled Band

Kazuma Asogi was chosen to represent the Imperial Yumei University in the British Empire as part of an international exchange student program. Kazuma, smuggles his best friend Naruhodo aboard the SS Burya as a stowaway. Naruhodo lives inside Kazuma's cabin closet. Kazuma is found dead in his cabin, with the door bolted from the inside, once again making it appear as though Naruhodo had committed a murder. With the help of Mr. Herlock Sholmes and Susato, Naruhodo's innocence is proven and the mystery of Kazuma's death is cleared up. Naruhodo decides to replace Kazuma as the representative of the student exchange program.

Case 3 - The Adventure of the Runaway Room

Upon arriving in London, Naruhodo and Susato inform Chief Justice Mael Stronghard of the death of Asogi and his subsequent replacement by Naruhodo. Chief Justice intends to test Naruhodo by sending him to the Old Bailey to take on a trial involving a murder in a horse-drawn carriage. The Prosecutor Barok van Zieks, also known as the "Reaper of the Bailey", as the defendants in his cases would wind up dead regardless of their innocence.

Naruhodo and Susato live in the attic of 221B Baker Street with Herlock Sholmes and Iris Wilson.

Case 4 - The Adventure of the Clouded Kokoro

Naruhodo is assigned to defend Soseki Natsume, a Japanese transfer student, who has been charged with stabbing a woman to death.

Case 5 - The Adventure of the Unspeakable Story

A pickpocket named Gina Lestrade attempts to access Iris Wilson's manuscript of her book "The Hound of the Baskervilles" in a pawn shop, which results in the shop owner's death. A large international plot is uncovered by Naruhodo in court.


  • In the English localization, Sherlock Holmes becomes Herlock Sholmes to avoid copyright issues held by the Doyle Estate. This mirrors the case in 1901, when Maurice Leblanc originally used the name in his stories about Arsène Lupin for the same reason. Similarly, John H. Watson, becomes John H. Wilson. While other Holmes characters such as Tobias Gregson or Lestrade, retains their original names.
  • The title of case 2 "The Adventure of the Unbreakable Speckled Band" is a reference to the Sherlock Holmes story "The Adventure of the Speckled Band".
  • The character of Soseki Natsume is based on a real japanese poet and author who lived in London at the time.