A story of a samurai girl with demon horns

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This is the official website of the Japanese anime Operation ONI that we're creating in the traditional brush painting style named Sumi-e.

The first 15 minutes (episode 1) is currently in production. The release of the first 15 minutes (episode 1) and the next crowdfunding are scheduled for 2024.

Thank you for supporting our crowdfunding campaign on Kickstarter. The names of those who support this project will be listed during the credits of the film. Let's make a great film together and surprise the world with this Sumi-e anime. Our goal is to bring this film to the film festival abroad and walk the red carpet. We sincerely appreciate your warm support.

June 02, [Scene 3, 8] Mao draws her cursed sword, and... New
May 26, [Scene 3, #7b] Onatsu forcefully begins training.
May 19, [Scene 3, #7a] Onatsu does not approve of Mao wanting to take a break from training.
May 12, [Scene 3, #6] Mao doesn't feel like it today...
May 05, [Scene 3, #3,4] They smile finally.
Apr 28, [Scene 3, #2] Onatsu makes a surprising suggestion.
Apr 21, [Scene 3, #1] Sorrow.

Scene #2 of Episode 1

Sumi-e is one of the East Asian styles of traditional brush painting. While it's monochrome, it can express rich and impressive scenes. Watch these drawing videos and you'll find what it is.

#1, Drawing the castle town in Sumi-e

#2, Drawing an alley in Sumi-e

#3, A Sumi-e trial lesson with Tomiko Claire

#4, Drawing Tomiko Claire in Sumi-e

ONI are Japanese demons with horns. They have been popular stock characters in Japanese fairytales, manga, film, art, literature, theatre and so on for a long time.

And the lead of this film has these horns too, even though she is not an ONI. You will be able to see the reason why she has horns and discover the meaning of "Operation ONI" at the end of story. It's a military operation concerning her.

This is a fictional story about Japan when there were "samurais".

A war is about to break out between humans and the Empire of Spirits. Mao, the strongest samurai with ONI horns, had been separated from her parents by death and was raised by the tyrannical lord.

Mao is human, but because of the demon horn on her head, she is not considered human. She has always felt lonely.

Only her best friend, Onatsu, was able to save her from her loneliness. Filled with Onatsu's family-like love and affection, Mao felt happy for the first time in her life.

Then, a war begins between humans and monsters. Mao wants to protect both their country and Onatsu, but Onatsu says, "This is the end of our friendship." She bursts into tears and disappears.

What is the true meaning of Onatsu's words?
And what will become of their friendship?

The truth is hidden in Mao's mysterious horns...


Voice actress: Risa Imayanagi (Website / Twitter)

Age: 18
Birthday: April 1
Nationality: Mito
Race: Human

A samurai with ONI horns on her head and uncommon strength. People call her ONI, but she is a pure-hearted, calm and kind person.

She has no family other than her tyrannical foster father, Hakuo. However she doesn't feel lonely thanks to her best friend, Onatsu. With her, she is happy.

Favorite food: Steamed white rice
Her name means: Sakura in full bloom

Designed by Suzu Nomiya



Voice actress: Yuri Kondo (Website / Twitter)

Age: 22
Birthday: August 8
Nationality: Tama
Race: Human

Mao's best friend, working as a chef in a local restaurant.
She is one of the few people who are as strong as Mao.

She is very patient, and is very affectionate only to Mao. She is the happiest when she takes care of her.

On the other hand, she's tight-lipped and doesn't like to talk about her personal life a lot.
Sometimes she looks at Mao and has tears in her eyes, but she doesn't want to talk about why. Sometimes she stares at Mao with icy eyes, but doesn't want to talk about the reason why. Sometimes she's desperate and wants to be alone, but doesn't want to talk about why.

Favorite food: Katsuobushi (Bonito Flakes)
Her name means: Summer (Natsu means summer)

Designed by Suzu Nomiya



Voice actress: Ryoku Dion

Age: 5382
Birthday: January 1
Nationality: Empire of Spirits
Race: Spirit (Humans call them monsters)

The legendary fox spirit who uses the arts of brainwashing and transfiguration. She is a general in the Empire of Spirits.

People say she has been involved in many historical turning points in the entire world.

Nothing else is known about her.

Favorite food: dango (fake information maybe)
Her name means: Flower in autumn

Designed by Suzu Nomiya



Voice actor: Takashi Narumi (Website / Twitter)

Age: 48
Birthday: January 21
Nationality: Mito
Race: Human

Mao's father and the lord of Mito Castle. A crazy and diabolical tyrant. People say he is eating monsters (spirits) in order to increase his strength. He is called "demon" by spirits, and his life is in danger.

Favorite food: Secret
His name means: King in winter

Designed by Suzu Nomiya


Ohaguro bettari

Voice actress: Momoko Iwasawa (Website / Twitter)

Age: unknown
Birthday: unknown
Nationality: Empire of Spirits
Race: Spirit (Humans call them monsters)

Saki's boss, and an ambitious monster who is always aiming for a higher position. She covers her teeth with black paint as part of type of fashion called "Ohaguro". She applies a solution of iron dissolved in acid to her teeth, and then applies a powder called fushiko, which contains a lot of tannin.

Favorite food: human
Her name means: lots of black on teeth

Designed by Suzu Nomiya



Voice actress: Tomiko Claire (Website / Twitter)

Age: 2
Birthday: unknown
Nationality: Empire of Spirits
Race: Spirit (Humans call them monsters)

Ohaguro bettari's buddy. This kitten relies on Ohaguro bettari and is always on her shoulder. She likes to speak foreign languages.

Favorite food: Milk
Her name means: Pupa

Designed by Suzu Nomiya

Manager of a Local Restaurant
Voice actor: under consideration

Rice Shop Girl
Voice actress: under consideration

Rice Shop Boy
Voice actor: under consideration

Hakuo's Aide
Voice actress: under consideration

Hakuo's Aide
Voice actor: under consideration

Town Girl
Voice actress: Neon (YouTube)

These Sumi-e art will be background pictures of the film. It's extremely compelling and I'm sure you will feel inspired by it. We are very honored to invite you to this mysterious and traditional Asian world.

Castle town

The first collab with digital and analog Suibokuga (Sumi-e)

A castle surrounded by sakura trees

Mao in front of a monster

Harvesting summer vegetables

Dancing in Yukata at a summer festival

Enjoying a picnic lunch

On the hilltop

Under the big cherry tree


Unspoken Secret

Hakuo, diabolical tyrant

Captured image #1 of the last scene of the trailer

Captured image #2 of the last scene of the trailer

Captured image #3 of the last scene of the trailer

Captured image #4 of the last scene of the trailer

Starting production on Episode 1

This town’s people are afraid of Mao

(Scene 2, #6) Onatsu hurries in front of Mao and yells at the crowd

Onatsu is yelling at the crowd!

Onatsu, the chef in a local restaurant, is announcing the menu for tonight.

Onatsu stomps on the ground and yells!

She's going to dye the ground red.

They flee in fear of Onatsu.


Onatsu makes a surprising suggestion.

They smile finally.

Mao doesn't feel like it today...

Onatsu does not approve of Mao wanting to take a break from training.

Onatsu forcefully begins training.

Mao draws her cursed sword, and...

A video message from our lead voice actress,
Risa Imayanagi


Fawkes Sutherland Introduction 

Introduction of the voice actress of Sanagi, Tomiko Claire

Introduction of Hakuo's voice actor, Takashi Narumi

Introduction of Ohaguro Bettari's voice actress, Momoko Iwasawa

Introduction of Town Girl's voice actress, Neon



Hiroshi Takane
Producer, Director, Story, Script Writer and Editor
A scriptwriter and director born in Tokyo Japan in 1979. In 2005, he graduated from the department of scriptwriting of Japan Academy of Moving Images, that Director Shōhei Imamura established, and began his career on 428: Shibuya Scramble in 2006, as a member of Synthese Co., Ltd., a scriptwriting company, of which he is a founding member. He has been writing scripts for Fire Emblem and other famous titles for more than 15 years, and also has worked on advertisements for NHK, LEXUS, SONY, Wacoal, BABYMETAL, and Granblue Fantasy etc. This is his first film as a director. (Linkedin / FilmFreeway / IMDb)
Suzu Nomiya
Character Designer

A freelance illustrator. Striving to draw attractive expressions. (Linktree)
Sho Hosokawa
Sumi-e art director, Background artist
Has been self-taught in Suibokuga and watercolor since junior high school. For several years after his high school years, he explored the roots of beauty by copying famous paintings from all over the world. He discovered that the oldest animation techniques in Japan, such as Chōjū-giga (Animal Caricatures), and modern animation techniques have the same tradition that has been handed down from generation to generation while changing their forms. Since then, he has been researching "the expression without discomfort" as a bridge between traditional culture and modern animation culture. (YouTube, Twitter)
Kinosuke Rakuga (Yoko Mori)
Action Director / Animator
Graduated from Tokyo Animator Gakuin. After having worked as an illustrator for educational materials and sales advertisements, she is now a housewife who makes hobby videos.
Assistant Animator
Agreed with the project and joined to help in any way she can. She draws manga and novels as a hobby.
Kaori Fukui
Director of audiography
She started her career in 2010 as a game recording director and has worked in a wide variety of genres including dubbing, commercials, and radio dramas.
Hiroko Aoyama
Script Director

Has worked several times with Director Takane since NHK, and directed most of his scripts. Founded a creative team named "DIP.LÔME" with him in 2015. This film is the first work as DIP.LÔME.
Fawkes Sutherland (南国 鷹)
Music Composer
As a student, this is his first major project as a composer. (Twitter)
Alejandro Jiang (Hazeiko)
Monster designer
A freelance illustrator and concept artist. His inspiration comes from the deep value and heart of things that roam in our world, in meanings behind surfaces, behind crude ideas that blossom into beauty. Searching for a way to express those hidden gems to the jeweled eyes of those that wander. (Website / Twitter)
Roberta Alosi
Monster designer
Italian character designer and concept artist. She graduated from her country's art academy. She loves art in all its forms, from traditional to modern. Her goal in life is to get into people's hearts by her art. (Instagram / Twitter)
Marco Preißer
English Advisor
A teacher for English, ethics and philosophy from Germany. In his spare time, he writes music and plays the guitar in several metal bands.
Risu Suzaki
Assistant Script Writer
Training to be a writer as a disciple of Director Takane. (Twitter)
Deanna J. Wright
English Translator
She is an American writer, translator, teacher, and project leader currently living in Berlin to complete her Master's degree in Sociology and Politics. She lived in Osaka for seven years and hopes to share her love and appreciation for Japan and the Japanese language through her translation and teaching work. (LinkedIn)
Eugene Kwaku
Public Relations
A marketing executive and public relations specialist who covers broad range of category from art, music to business and entrepreneurship. His mission is to connect different countries through individuals “passion” of building things and contributing to the good of people and society. (LinkedIn)
kofudeya (Kumiko Goto)
Kanji Logo Designer
An amazing Kanji Logo Designer who created a Kanji Logo for this anime.
Pedro H. de Souza
Brazilian portuguese Translator
Hi I'm a college student that just likes pop culture so much and fell in love with this project so I decided to help with what I can. (Twitter)
Producing and providing background music, mixing, mastering, and karaoke sound sources. He's extremely thrilled because he loves Japanese style music and wanted to be involved in this film production.

Jean-Michel Bruyere
Business Advisor

A Belgian entrepreneur, passionate about start-ups and self-employed projects. He has worked in various fields such as chemistry, catering, the environment and energy.

Thanks to all of you, our crowdfunding campaign for the first 15 minutes (Episode 1) in 2022 ended successfully on both Kickstarter and CAMPFIRE. Thank you from the bottom of our hearts for your warm support!

The first 15 minutes (episode 1) is currently in production. The release of the first 15 minutes (episode 1) and the next crowdfunding are scheduled for 2024.

The length of the film is approximately 60 minutes. Since we do not have a large production team, it will take about 5 years to complete the film. We feel bad about keeping you waiting for a long time, so we decided to divide the film into 4 episodes and produce and release 15 minutes of each part every year (12-15 months). In the scripts, I created a climax and a cliffhanger every 15 minutes , so this anime can be enjoyed either in full version or in small 15-minute episodes. This way, our supporters will be able to enjoy our film every year or so. Our ultimate goal is to combine these four episodes into a single movie and bring it to film festivals in the U.S. We would like to walk the red carpet. It is our dream. Thank you very much for your cooperation.

Best regards,
Producer, director, story, script writer and editor of Operation ONI
Hiroshi Takane

Copyright (C) Operation ONI. All rights reserved.