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Nōnai Poison Berry
脳内ポイズンベリー; (Nōnai Poizun Berī)
Genre	Romance, slice-of-life
Manga
Written by	Setona Mizushiro
Published by	Shueisha
Imprint	Queen's Comics
Magazine	Chorus/Cocohana
Demographic	Josei
Original run	December 28, 2009 – March 28, 2015
Volumes	5 (List of volumes)
Live-action film
Poison Berry in My Brain
Directed by	Yūichi Satō
Written by	Tomoko Aizawa [ja]
Music by	Akio Izutsu [ja]
Released	May 9, 2015
Runtime	121 minutes
Stage play
	Title: Poison Berry in My Brain; Directed by: Yūichi Satō; Written by: Yūka Arai, Takayuki Imanara; Venue: New National Theatre, Tokyo; Location: Shibuya, Tokyo, Japan; Date: March 14 – 29, 2020;
Stage play
	Title: Poison Berry in My Brain; Directed by: Yūichi Satō; Written by: Yūka Arai, Takayuki Imanara; Venue: Meiji-za, COOL JAPAN PARK OSAKA [ja]; Location: Chūō, Tokyo, Japan; Chūō-ku, Osaka, Japan; Date: August 26 - September 6th, 2022 (Tokyo); September 10–12, 2022（Osaka）;

Nōnai Poison Berry (Japanese: 脳内ポイズンベリー, Hepburn: Nōnai Poizun Berii, transl. Poison Berry in My Brain) is a Japanese slice-of-life romance manga series written and illustrated by Setona Mizushiro. It was serialized in Chorus magazine, later relaunched as Cocohana magazine,^[3] from December 2009^[4] to March 2015^[5] and collected as five tankōbon volumes by publisher Shueisha.^[6] The series was adapted into a live-action film that premiered in Japan in May 2015,^[7] as well as a stage play that ran at the New National Theatre, Tokyo, in March 2020, both directed by Yūichi Satō^[8]^[9] and officially titled Poison Berry in My Brain in English.^[10]^[11] The Stage play was rerun in 2022 with a different cast.^[12]

Characters

Ichiko Sakurai (櫻井いちこ, Sakurai Ichiko): Portrayed by: Yōko Maki (film),^[7] Misako Renbutsu (1st stage play),^[8] Yuika Motokariya (2nd stage play)^[12]; The series' main character, a shy 30-something whose inner thoughts appear to readers as a board of five very different individuals. When she falls for a younger man at a drinking party, the board members fall into a panic.
Ryōichi Saotome (早乙女亮一, Saotome Ryōichi): Portrayed by: Yuki Furukawa (film),^[7] Aoto Watanabe (1st stage play),^[9] Shunya Shiraishi (2nd stage play)^[12]; Ichiko's love interest.
Ochi (越智): Portrayed by: Sonha (film),^[7] Shunya Shiraishi (1st stage play),^[9] Ryo Hirano [ja] (2nd stage play)^[12]; A publishing company editor who shows interest in Ichiko.
Yoshida (吉田): Portrayed by: Hidetoshi Nishijima (film),^[7] Hayato Ichihara (1st stage play),^[8] Yusei Yagi [ja] (2nd stage play)^[12]; The leader of Ichiko's board members. He is generally the member who initiates group votes on Ichiko's next actions.
Ishibashi (石橋): Portrayed by: Ryunosuke Kamiki (film),^[7] Katsuki Motodaka [ja] (1st stage play),^[8] Hiroki Ino (2nd stage play)^[12]; An optimistic board member with a hopeful outlook for Ichiko's future.
Ikeda (池田): Portrayed by: Yō Yoshida (film),^[7] Seina Sagiri [ja] (1st stage play),^[8] Hanayo Kimura [ja] (2nd stage play)^[12]; A negative board member who believes that most of Ichiko's actions will end badly.
Hatoko (ハトコ): Portrayed by: Hiyori Sakurada (film),^[7] Yūri Saitō [ja] (1st stage play),^[8] Yuna Hayakawa (2nd stage play)^[12]; A Gothic Lolita board member who thinks and votes on impulse, rather than weighing the pros and cons.
Kishi (岸): Portrayed by: Kazuyuki Asano [ja] (film),^[7] Kim Kwangsu (1st stage play),^[8] Ken Ishiguro (2nd stage play)^[12]; An elderly board member caught up in the past.

Volumes

No.	Japanese release date	Japanese ISBN
1	May 19, 2011^[13]	978-4-08-865626-7
2	July 25, 2012^[14]	978-4-08-865658-8
3	August 23, 2013^[15]	978-4-08-865666-3
4	September 25, 2014^[16]	978-4-08-865670-0
5	April 24, 2015^[17]	978-4-08-865672-4

Reception

Nōnai Poison Berry ranked 20th in the 2013 Kono Manga ga Sugoi! Top 20 Manga for Female Readers survey.^[18] It was also a Jury Selection in the Manga Division at the 17th Japan Media Arts Festival Awards.^[19]