One of the new scenarios in *The Portopia Serial Murders: Sequel* tells the story of a high school girl who believes in her father’s innocence. An overview of “Investigation File: Yukiko Hirata” has been released—with Yuko Natsuyoshi providing the voice for the main character.
G-Mode has announced the second wave of cast members for *The Portopia Serial Murders: The Burial of Oblivion*.
Accused of murder by her father… High school student Yukiko Hirata sets out to uncover the truth alongside her best friend
This title consists of a total of six “Investigation Files,” comprising a remake of *The Portopia Serial Murder Case* plus five new stories. The story and characters for “Investigation File: Yukiko Hirata,” a new scenario part, have now been revealed.
The protagonist of this story, Yukiko Hirata, is a high school girl whose father, Toru Hirata, went missing while still under suspicion of murder. Determined to clear her father’s name, Yukiko teams up with her best friend, Miharu Koshiba, and heads to the crime scene—the mansion of Kozo Yamakawa—in search of clues.
The characters and cast for “Investigation File: Yukiko Hirata” are as follows (honorifics omitted).
Yukiko Hirata (Voiced by: Yuko Natsuyoshi) The daughter of Toru Hirata, a produce store owner. A high school student. She used to have a strained relationship with her father and went through a rebellious phase, but she has since settled down somewhat.
Miharu Koshiba (CV: Ami Tsukishiro) : Yukiko Hirata’s childhood friend and best friend. She attends the same high school as Yukiko.
Tomoaki Maeno voices Yasuhiko Mano, aka “Yasu”! A recap of the first wave of cast members
On November 2, the first wave of cast members for the remake segment, “Investigation File: Yasuhiko Mano,” was announced.
In “Investigation File: Yasuhiko Mano,” Kozo Yamakawa, the president of the consumer finance company “Loan Yamakin,” is found dead in his home study. What initially appeared to be a suicide begins to raise suspicions of homicide.The veteran chief detective of the Hyogo Prefectural Police’s First Investigative Division and his partner, the young detective Yasuhiko Mano, launch an investigation.
Characters and Cast of “Investigation File: Yasuhiko Mano” (Titles omitted)
Yasuhiko Mano (Voiced by: Tomoaki Maeno) : A promising young detective in the Hyogo Prefectural Police’s First Investigation Division. He appears carefree, but a dark shadow occasionally peeks through.
Fumie Sawaki (Voiced by: Yuka Hiiragi) Secretary to Kozo Yamakawa, president of Loan Yamakin. She was the first to discover Kozo’s murder, along with security guard Komiya.
Toshiyuki Yamakawa (Voiced by: Katsuya Fukunishi) The nephew of Kozo Yamakawa, president of Loan Yamakin, and his only remaining relative. He is unemployed and survives by extorting money from Kozo; he has a prior conviction for assault.
Rokusuke Komiya (CV: Kosuke Echigoya) A security guard at the residence of Kozo Yamakawa, president of Loan Yamakin. He is a timid, nervous man, but also stubborn to a fault.
Okoi Yuhi (Voiced by Kana Ueda) : A dancer working at the Shinkigeki Silver theater in Shinkaichi.
Additionally, characters and cast members for new storylines will be announced sequentially on official X and other platforms.
The “Vanishing into the Okhotsk” BEST PRICE Edition will be released on the same day, and “KitaCon” will feature a live drawing session by Kyoji Asano
Additionally, it has been confirmed that the Switch physical edition, *Hokkaido Chain Murders: Vanishing into the Okhotsk—Drifting Ice of Memories, Tears of the Nipopo Doll—BEST PRICE Edition*, will be released on the same day as the main game, March 4, 2027.
The price has been reduced from the standard 8,800 yen to 5,478 yen, and the Famicom version of *Vanished in the Okhotsk* will continue to be included in the package.
Additionally, G-Mode will be exhibiting at the pop culture event “Hokkaido Entertainment Convention in Kitahiroshima (Kita-Con),” to be held in Kitahiroshima City, Hokkaido, on November 14 and 15.
From 4:00 PM to 4:45 PM on November 14, a stage event will be held at the “Tonarie Field Live Arena” on the second floor of Tonarie Kitahiroshima, featuring Kyoji Asano (WIT STUDIO), who handled the character design for this title, and Koichi Takeshita of G-Mode.In addition to a live drawing session by Mr. Asano, gameplay footage from the title will be showcased on a 220-inch giant screen.
A Classic Mystery Adventure Revived in the Reiwa Era
This title is a mystery adventure game with Yuji Horii serving as original creator and executive producer. It is a completely new title—a full remake of *The Portopia Serial Murders* with a significant new story added—featuring music by Shinya Kiyozuka and character design by Kyoji Asano.
Game*Spark conducted an interview with Koichi Takeshita of G-Mode, the game’s publisher. We asked about the intent behind the single character “Sequel” (続)—which Horii reportedly conceived—as well as the team’s approach to faithfully recreating the original while making it more accessible for modern players.
At the Tokyo Game Show 2026, we also published a hands-on report by a writer who hadn’t played the original game. It conveys the unique feel of the remake, including its abundance of choices, Yasu’s calm comebacks, and the fast-paced gameplay system. If you’re interested, be sure to check it out.
*The Portopia Serial Murders: The Burial of Oblivion* is scheduled for release on March 4, 2027, for PC (Steam), Nintendo Switch 2, and Switch.The download version is priced at 4,800 yen, while the standard physical edition for Switch 2 and Switch is 7,678 yen, and the limited edition is 9,878 yen.
The Switch 2 and Switch physical editions will include the complete Famicom version of *The Portopia Serial Murder Case* (both Standard and Limited Editions; the digital and Steam versions do not include this).The Limited Edition comes with an A5-sized booklet and an original soundtrack CD. Additionally, pre-orders with exclusive bonuses are being accepted through the G-Mode Official Online Store (BOOTH) (scheduled to close at the end of December 2026).
