A new main visual, first trailer, and additional staff and cast members for Shueisha and BONES Film’s TV anime adaptation of Joumyaku and Mizuki Yoda’s MARRIAGETOXIN manga series have all been revealed. The new MARRIAGETOXIN anime is set to premiere in 2026, and the anime’s new cast members all shared comments regarding their roles.
Get the latest details below:
New MARRIAGETOXIN Character Introductions
Kyoko Himekawa (voiced by Anna Nagase)
She works to recover art that has been unjustly taken and return it to its rightful owners. Highly skilled in communication, she can become friends with anyone, yet rarely speak much about herself. She has a deep love for sharks, and collects shark-themed merchandise and movies.
Shizuku Ushio (voiced by Mariya Ise)
“Water Master.” A businessman of the underworld. Highly businesslike and thorough in her work, she completes every task with precision. She’s always dressed in a diving suit.
Shiori Ureshino (voiced by Asaki Yuikawa)
A college student and the heir to Balzak, a major party supply corporation worth 1.5 trillion yen. Shy and overly considerate of others’ feelings, she is aware of this trait and wishes to change. Her hobby is performing magic tricks, and she loves making people smile.
Genya Naruko (voiced by Soma Saito)
A direct descendant of the “Sound Master” lineage. Possesses a unique aura and distinctive way with words. Not only is he extremely handsome, he is highly popular among the ladies. Since he needs to stay relaxed to use his abilities, he’s come up with his own unique ways to unwind.
Kimie Arashiyama (voiced by Hinano Shirahama)
A “Hamster Master,” a branch descendant of the “Beast Master” bloodline. Sirius, her partner, is highly skilled in intelligence work. During her childhood, she was once saved by Gero, which led her to be his secret admirer. She currently works at a small-to-medium-sized advertising agency as she is searching for her long-lost brother.
Piichi Nakagawa (voiced by Simba Tsuchiya)
An ordinary human, but a genetic anomaly with abilities far beyond a Master. He possesses exceptional information-processing skills along with superhuman physical abilities but needs to sleep over 10 hours a day to function properly. However, after sleeping, his body can heal almost any injury or ailment. In terms of pure talent as an assassin, he is among the very best in the modern era.
New MARRIAGETOXIN Voice Cast Comments
Anna Nagase: voice of Kyoko Himekawa
“I’m Anna Nagase, and I’ll be voicing Kyoko Himekawa. When I first read the original manga, I was surprised by the unexpected combination of “marriage hunting” and “hitmen,” and I couldn’t help but laugh at the contrast between the two themes. I’m truly thrilled to be playing Kyoko Himekawa, a character I absolutely love!”
“I was immediately drawn to Kyoko’s boldness, straightforward nature, and strong inner core the moment I started reading. I can’t wait for the broadcast to begin… and I hope all of you are looking forward to it as well!”
Mariya Ise: voice of Shizuku Ushio
“I’m Mariya Ise, and I will be playing Shizuku Ushio! When I first read the original manga, my reaction was, ‘She’s wearing a helmet… and she’s underwater…? How am I supposed to voice her?’ (laughs). I approached the role with the hope of bringing out Ushio’s coolness and mysterious aura, so I hope you enjoy my performance!”
Asaki Yuikawa: voice of Shiori Ureshino
“Because of her father’s death and the enormous pressure of being the next president of a major corporation, Shiori often finds herself spiraling into negative thoughts. But at her core, she’s an incredibly hard-working girl.
Thanks to her own sincerity—and the presence of Gero and the others—she grows little by little throughout the story.
Please look forward to seeing how these already charming heroines become even more wonderful as they encounter Gero and move forward together!”
Soma Saito: voice of Genya Naruko
“I’m Soma Saito, and I have the honor of voicing Genya Naruko, the ‘Sound Master.’ As someone who has long enjoyed this series as a reader, being able to participate as the voice of my favorite character is truly a joy. We’ve already completed the recording sessions, and the atmosphere was both stimulating and wonderful—I honestly can’t wait to see the finished version.”
Hinano Shirahama: voice of Kimie Arashiyama
“I’m Hinano Shirahama, and I’m honored to be playing Kimie Arashiyama.
It is truly a privilege to be involved in such a fun and wonderful series!
Arashiyama is a wonderfully bold and straightforward girl who throws her whole heart into everything she does—but I also find the moments when her delicate side peeks through to be a big part of her charm.With her expressive, ever-changing emotions, and with the unique appeal that shines all the more in a world filled with ‘sound,’ I approached the role with all my strength and passion—with as much energy and passion as Arashiyama herself.
Please look forward to the MARRIAGETOXIN TV anime!”
Simba Tsuchiya: voice of Piichi Nakagawa
“To me, Piichi Nakagawa is a character who embodies ‘love’” itself—someone who carries both kindness and madness within him. I hope to express the intense emotions flickering inside him with the same honesty and unfiltered sincerity that define Piichi.”
Motonobu Hori is directing the MARRIAGETOXIN anime series. Kimiko Ueno is in charge of series composition and scripts, Kohei Tokuoka is the character designer and chief animation director, and Taisei Iwasaki and yuma yamaguchi are the music composers. BONES Animation is supervising the production by BONES Film and MARRIAGETOXIN Project.
Additional staff includes:
- Sub Character Design: Yurika Sako
- Costume Design: Kotono
- Prop Design: Ayumi Nagaki, Ryo Hirata
- Art Design: Toshiki Amata
- Art: Bihou
- Color Design: Hiroko Umezaki
- Photography Director: Go Kanbayashi
- 3DCG: SANZIGEN Inc.
- CG Animation Director: Taiki Nagashima
- Editing: Kumiko Sakamoto
- Sound Director: Haru Yamada
- Sound Effects: Tomokazu Mii
The confirmed cast of the anime includes:
- Hikaru Gero: Haruki Ishiya
- Mei Kinosaki: Shion Wakayama
- Kyoko Himekawa: Anna Nagase
- Shizuku Ushio: Mariya Ise
- Shiori Ureshino: Asaki Yuikawa
- Genya Naruko: Soma Saito
- Kimie Arashiyama: Hinano Shirahama
- Piichi Nakagawa: Simba Tsuchiya
- Akari Gero: Haruka Shiraishi
- Toshiki Hanamaki: Isamu Yusen
Here’s an overview of the anime, courtesy of Shueisha:
For centuries, the deadly arts have been perfected by those known as the Masters. Among them, the Poison Masters of the Five Great Families hold the most fearsome power and influence. Hikaru Gero, heir to the Poison Masters’ Gero Family, has lived his entire life in the underworld, far removed from love or marriage.
But when the Gero Family head decrees that Hikaru’s sister must bear an heir to preserve the bloodline – by force if necessary – Hikaru resolves to protect her at all costs. It is then that Hikaru encounters Mei Kinosaki, a brilliant marriage swindler who becomes the target of his latest job. Realizing that the only way of solving the family succession problem and protecting his sister is through marriage, Hikaru impulsively asks Mei for help in finding a bride.
“That’s the first time anyone’s ever proposed like that.”
And so, with the cunning marriage swindler Mei as his advisor, elite assassin Hikaru embarks on the most challenging mission of his life: finding a wife!
Their goal: the ultimate marriage.
This is the world’s toughest mission for love, brought to you by the ultimate duo – an assassin and a marriage swindler!
