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Seishiro Jigoku
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Seishiro Jigoku
I find the defendant, Ryunosuke Naruhodo... guilty!

Seishiro Jigoku was a Japanese judge during the Meiji period. He presided over Ryunosuke Naruhodo's trial for the murder of John Wilson and Rei Membami's trial for the murder of Jezaille Brett. He later traveled to England with an old colleague of his, Yujin Mikotoba, where he was a witness to the murder of Tobias Gregson.

Graveyard murder[]

Main article: Professor Killings
This section contains major plot details for the following: The Resolve of Ryunosuke Naruhodo. Proceed with this in mind.

Sometime while Seishiro Jigoku was a student, he travelled along with his fellow students Genshin Asogi and Yujin Mikotoba as part of a program to study abroad. Six years into this study, Asogi was arrested on suspicion of being the notorious serial killer of London, known as the Professor. This was because evidence and witness testimony implicated him in the murder of renown prosecutor Klint van Zieks, which was used to implicate him for the serial killings of several other nobles that had occurred in a recent span of time. It was believed that Klint van Zieks' murder was the fifth of five murders committed by the Professor. During Asogi's trial, Jigoku provided testimony to convince people of Asogi's innocence, in which he became agitated to the point of destroying the witness' stand in the courtroom. This incident caused Jigoku to face legal trouble, as his actions were seen as offensive to Great Britain. Additionally, along with Mikotoba, Jigoku implored to Asogi to allow them to help his case further by petitioning the government. However, Asogi refused their help, and also refused to deny the charges laid against him. Asogi was eventually convicted and sentenced to death.

This sentence proved to be a farce, as Asogi was instead the center of a conspiracy: while Asogi had been responsible for killing Klint van Zieks, he was not the serial killer known as the Professor. In reality, Klint van Zieks was the serial killer, and had been blackmailed into committing several of the murders by Mael Stronghart, another renown prosecutor at the time. Stronghart, behind the scenes, had fabricated the evidence that was used to get Asogi arrested and convicted for being the Professor. This was a part of Stronghart's plan to conceal his role in the Professor killings, which required eliminating Asogi as a threat. While Asogi was imprisoned and pending trial for potentially being the Professor, Stronghart visited him in prison to make him a deal: he would allow Asogi to live and return to his home country of Japan, if Asogi would accept the charges laid against him and be convicted of being the Professor. Asogi agreed to this plan, and on the night he was slated to be executed, he was instead buried alive in a coffin to be retrieved by Stronghart.

Shortly after Asogi's trial, Jigoku himself went through a trial over the witness' stand he destroyed. He was acquitted of criminal charges and was only fined for the cost of repairing the witness' stand. It was around this time that Jigoku was recruited into Stronghart's plot surrounding Asogi. Stronghart revealed that Asogi's execution was a farce, and that he would instead be buried alive in Lowgate Cemetery, the cemetery connected to Barclay Prison. For his plan, Stronghart needed Jigoku to help him retrieve Asogi, as well as help send Asogi back to Japan. In exchange, Stronghart promised Jigoku that he would help him become the Japanese Minister of Foreign Affairs. Jigoku accepted the deal, seeing it as a great boon to himself.

The night of Asogi's fake execution, Stronghart and Jigoku went to Lowgate Cemetery to retrieve Asogi from his coffin. As they approached the plot where Asogi was buried, they encountered an unforeseen event. Enoch Drebber, a local university student studying science, had been seeking out fresh corpses to study. To facilitate this, he did what many other of his fellow students did: harvest recently buried corpses from nearby cemeteries. That night, Drebber dug up the plot in which Asogi had been buried. This caused him to witness what appeared to be Asogi resurrecting from the dead. This terrified Stronghart and Jigoku: Drebber would almost certainly inform other people of what he had seen, endangering the secret operation and possibly revealing what had actually happened in order for Asogi to be found alive in his grave. With no choice but murder to conceal their secret, Stronghart coerced Jigoku to murder his friend. Jigoku shot Asogi in the chest and killed him, sending him falling back into his fake grave below and splattering blood all over Drebber and his camera. After Drebber fled the scene in fear, Stronghart and Jigoku reburied Asogi and left the scene.

Jigoku, along with Yujin Mikotoba, was eventually summoned back to Japan following the Professor case. Despite the fact that the original plan to repatriate Asogi had gone terribly wrong, Stronghart still fulfilled the promise that he made to Jigoku: he helped Jigoku become the Minister of Foreign Affairs in Japan. While in this position, Jigoku helped out with the Anglo-Japanese Treaty of Friendship and Navigation.

Ten years after the Professor case and Asogi's death, Jigoku was once again coerced by Stronghart into helping him conceal his plot. In order to conceal the plot once and for all, Stronghart required John Wilson and Tobias Gregson to die. To facilitate their deaths, Stronghart and Jigoku planned an assassin exchange, communicating this plan via telegram. Stronghart was to send the assassin Asa Shinn to Japan in order to murder John Wilson. Meanwhile, Jigoku was to send an assassin from Japan to murder Tobias Gregson. The reason for the exchange was to exploit jurisdiction restrictions: both of their chosen assassins would be able to escape punishment, as both would be repatriated back to their countries for their trials, where they could then be relieved of any penalty.

End of spoilers.

Judge career[]

Trial of Ryunosuke Naruhodo[]

Main article: The Adventure of the Great Departure

Seishiro Jigoku presided over the trial of Ryunosuke Naruhodo when he was accused of murdering university professor John Wilson. Although Kazuma Asogi, was originally going to act as the defense attorney for the case, Naruhodo opted to defend himself against prosecutor Taketsuchi Auchi. Ultimately, Wilson's actual killer was revealed to be an exchange student named Jezaille Brett. Jigoku subsequently acquitted Naruhodo. Great Britain called for the right of consular jurisdiction, and instructed Jigoku to send her to Shanghai, China, as it was the closest place with a British consular court. After the conclusion of Naruhodo's trial, Jigoku also served as the judge for Iyesa Nosa's trial, who was revealed to be a thief guilty of theft from the restaurant Le Carneval and the attempted theft of a koban coin from Kyurio Korekuta during Naruhodo's trial.

This section contains major plot details for the following: The Resolve of Ryunosuke Naruhodo. Proceed with this in mind.

Sometime before Kazuma departed from Japan for his study abroad in Great Britain, Jigoku selected him to fulfill his end of his and Stronghart's assassin exchange. Jigoku instructed him to seek out Tobias Gregson and assassinate him.

End of spoilers.

Trial of Rei Membami[]

Main article: The Adventure of the Blossoming Attorney

Nine months after the trial of Ryunosuke Naruhodo, Seishiro Jigoku presided over another trial which was connected to that trial nine months ago: the murder of Jezaille Brett, the killer of John Wilson. Brett had been murdered a week after her extradition arrangements were finalized, and university student Rei Membami was accused of the crime. Auchi acted as the prosecutor for this trial, and Membami's defense attorney was her friend Susato Mikotoba; a judicial assistant disguised as "Ryutaro Naruhodo", the cousin of Ryunosuke Naruhodo. Prior to the trial, Jigoku had been informed by Susato's father Yujin Mikotoba that she was masquerading as a man to represent Membami. Throughout the trial, Jigoku supported Susato's charade and pretended to not notice anything. The actual killer of Jezaille Brett was eventually revealed to be journalist Raiten Menimemo, and Membami was subsequently acquitted. After the conclusion of the trial, Jigoku throttled Menimemo to the bailiff before the journalist could reveal any sensitive information about Kazuma Asogi to Susato. Jigoku then introduced himself formally to Susato, before leaving with her father to discuss something.

A fatal confrontation[]

Main articles: Twisted Karma and His Last Bow & The Resolve of Ryunosuke Naruhodo
This section contains major plot details for the following: The Resolve of Ryunosuke Naruhodo. Proceed with this in mind.

Seishiro Jigoku contacted Mael Stronghart to give Tobias Gregson a fake mission to kill him on the last day of October aboard the SS Grouse as it headed for France for escaping his trial ten years ago, then he'd go to the international scientific investigation symposium and represent Japan. The assassin sent with Gregson was Kazuma Asogi but he quit and left for Dunkirk after hearing what really happened to his father. When Jigoku returned to his room at 9 PM, he found Gregson there with his gun. He performed an ippon seoi nage on Gregson, which choked and knocked him unconscious. As first class cabins are surrounded by guards, he decided to wait until the emergency drill later that evening to do the final deed via strangling. Unfortunately, just as that time arrived, Gregson woke up and started attacking Jigoku in a frenzy. In a moment of panic, Jigoku used the gun the English government had given him in the exchange program sixteen years ago and shot detective Tobias Gregson killing him.

Group photograph of Seishiro, Mikotoba, Ryunosuke, Susato, and Inspector Gregson.

He took Gregson's coat off, which dropped his fish and chips, and hid his body in the large refrigeration room trying to buy some time and fake Gregson's time of death. He then put Gregson's body in his own suitcase and waited to take him off the boat, as there was no chance to throw the body overboard due to all the guards. In the Great Waterloo Hotel, Jigoku and Yujin met up with Susato and Naruhodo. They discussed the Professor Killings and how Genshin was convicted, this was when he found out that Kazuma is actually alive. Then Susato had a bellboy take a group photo of the four of them.

Jigoku had heard about Gregson's secret apartment on Fresno Street with "Hugh Boone" from Stronghart, and went to drop the body off there. He put on Gregson's red colored wig (that was used during his investigation of the Red-Headed League) as a disguise and bought some firecrackers from "Venus", he used that with the candles as a makeshift timer that would go off sounding like a gunshot. He placed he body nearby that and moved Gregson's bulletin board to cover him. That way, when "Boone" came to visit, he would be framed. Unfortunately, Klint's younger brother, prosecutor Barok van Zieks, who prosecuted Jigoku's trial, showed up when he was investigating detective Gregson regarding his Death Bringer curse and he took the fall instead. Maria Gorey noticed during Gregson's autopsy that the fish and chips were moldy in his coat pocket meaning someone tampered with him, this was Jigoku's mistake, they had already spoiled due to the heat in the cabin.

It was only in the subsequent trial that Seishiro Jigoku was finally brought to justice for his crimes and arrested. He tried to escape on the Grouse by bribing Tchikin Strogenov and hiding in his large trunk but he was found by Yujin Mikotoba and his old partner, Herlock Sholmes. During the trial, he kept calling Naruhodo a murderer despite the fact that he's the one acquitted him for the murder of John Wilson. After failing to blame Kazuma Asogi as Tobias Gregson's killer, Jigoku smashed the entire witness stand just like he did a decade ago and said this was the end of him. He signed a confession but didn't say anything about Mael Stronghart. Stronghart, being the current judge, declared him guilty for Gregson's murder and said he'd probably be executed at a later trial.

End of spoilers.



Seishiro Jigoku is a typically jovial man, but is quick to anger. He has a tendency to be absent-minded, such as when he put on Tobias Gregson's red wig in an attempt to disguise himself on Fresno Street. He often lets his outside relationships weaken his authority in the courtroom; he allowed Kazuma Asogi to make several disrespectful remarks about the Japanese government without penalty, allowed Ryunosuke Naruhodo to stand as his own defense last minute, and even allowed Susato Mikotoba to defend Rei Membami despite being a woman. He places great value on those in positions of power, as shown in his relationships to Mael Stronghart and the current Attorney General. He often boasts about his own credentials, such as his role as Minister of Foreign Affairs.

Jigoku is a brash individual, willing to directly approach Kazuma in public with his plans to send him on an assassination mission. He often lets his emotions get the better of him, such as when he first broke the witness stand in his attempt to defend Genshin Asogi in the Professor trial. Although he was coerced into shooting Genshin and blackmailed into cooperating with Stronghart's assassination exchange plot, he also spent his years in London studying under Stronghart as his student.

Jigoku has a boisterous laugh and a keen sense of humor. He loves taking out his gavel and shouting "GUILTY!" in a humorous way. He loves martial arts, especially the ippon seoi throw, and is strong enough to smash entire witness stands and knock Gregson out with a chokehold. According to Yujin Mikotoba, Jigoku is partial to all things large.

When he was summoned as a witness, he was meaner towards Ryunosuke. He spitefully called Ryunosuke a murderer despite knowing he was innocent of the murder of John Wilson and said that he should have convicted him just to spare the trial of the nonsense he was saying.


  • "Jigoku", when written as "地獄", means "hell".
  • His given name, Seishiro (政士郎), is comprised of the kanji for government (政) and samurai (士).


  • His appearance is based on the Buddhist god Enma, ruler and judge of the underworld, who passes judgment on all the dead.