---
title: 'バックオフィス　マネージャー at Spellbrush'
canonical: 'https://feeny.ai/job/spellbrush-tokyo-07ng2njrate7'
type: 'job'
last_seen: '2026-09-13'
---

# バックオフィス　マネージャー at Spellbrush

- **Company:** Spellbrush
- **Location:** Tokyo, Japan
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-08-15
- **Last confirmed live:** 2026-09-13
- **Apply:** https://jobs.ashbyhq.com/spellbrush/603d6b8e-e726-44e3-ade2-8b53a9a16a57

## Job description

私たちSpellbrushは最高のゲームを作るため日々魂を燃やす生成AIスタジオです！niji・journeyを開発し世界をリードするAI開発チームとしても知られています。 現代において、ゲームほど複雑に技術や要素が絡み合っているメディアはないでしょう。私たちは、AIでアーティストたちを支援し傑作ゲームを生み出すお手伝いができるよう、目下研究中です。 オタク大大大歓迎！！！

バックオフィスマネージャーの役割： 私たちが制約や限界を乗り越えAIとアニメやゲームとの垣根を取り払っていけるよう、力強く支えてくれるバックオフィスマネージャーを募集します。 事務・総務・経理などの業務を中心に、アメリカ本社と連携しながらSpellbrush Japanの運営を支え、会社の成長を裏側から全力サポートします。 ゲームやAI関連プロジェクトに絡むチャンスあり！新ジャンルや新規事業に挑戦する会社なので、事業拡大に貢献できるポジションです。業務の幅を広げて新しい挑戦をすることにワクワクする方はぜひご応募ください！

主な業務内容： 総務・庶務業務 経理・労務のサポート アメリカ本社との連携 会社の成長に合わせて生じる新しい業務への対応

こんな方を求めています： 日本語：ビジネスレベル以上 英語：ビジネスレベル アニメ・ゲーム・二次元文化への理解や親和性がある 少人数チームで幅広く動くことやスピード感のある環境を楽しめる

歓迎する経験・スキル： バックオフィス経験（事務、経理、人事など） 高いコミュニケーション能力 スタートアップやベンチャー企業での勤務経験

## About Spellbrush

## Company Overview
- **One‑liner**: Spellbrush is the world’s leading generative AI studio for anime – the team behind niji・journey – that is building a no‑compromise turn‑based tactics game.
- **Entity Type**: Private (Seed‑stage; received $245K in total funding from Y Combinator and other investors)
- **Headquarters**: San Francisco, California, United States (also offices in Chiyoda City, Tokyo, Japan)
- **Founded**: 2018
- **Founders**: Cory Li (CEO), Haitao Mao (Co‑Founder, GameDev), Ruwen Liu (Co‑Founder)

## Core Business
- **Primary industries**: Generative AI, Computer Games (Anime)
- **Target customers**: B2C – anime fans, gamers, and digital artists; also B2B2C through their AI image/video generation platform used by artists and studios.
- **Mission statement**: “Making Anime Real” – using AI to help human artists create masterpieces in the most complex medium of video games.

## Products & Services
- **[niji・journey](https://spellbrush.com/)**: AI image generation model specialized in anime and illustration styles; accessible via Midjourney. Users can generate high‑quality anime art from text prompts.
- **Niji Video**: A recently released video generation model that produces anime‑style video clips (announced in 2025‑2026).
- **Unannounced Turn‑Based Tactics Game**: A “good anime game” being developed in‑house, focused on well‑balanced gameplay and a truthful love of visual arts. The game uses Unity and leverages Spellbrush’s own AI research.

## Market Standing
- **Valuation / Market Cap**: Not publicly disclosed.
- **Key Metrics**:
  - Annual Revenue: Approximately $800K (estimated from 2025‑2026 data).
  - Total Funding: $245K (Seed rounds in 2018).
  - Headcount: ~25 employees (+19.2% YoY).
- **Notable Investors/Partners**: Y Combinator (Winter 2018 batch; primary partner Diana Hu). Seed investors include unnamed backers.
- **Growth Signals**:
  - 10 active job postings across AI research, engineering, and game design.
  - Released Niji Video, expanding beyond static images into anime video generation.
  - Expanded headcount by ~20% year‑over‑year.
  - Presence in both San Francisco and Tokyo, tapping into the global anime and game talent pool.

## Competitive Advantages
- **Leading generative AI for anime** – niji・journey is the most prominent anime‑focused AI image generator, with a large user community.
- **Deep integration with Midjourney** provides a built‑in distribution channel for their model.
- **Niche focus**: The company is singularly dedicated to high‑quality anime and game art, creating a tightly‑focused R&D pipeline.
- **In‑house game development** allows them to eat their own dogfood – using AI to accelerate game asset creation while maintaining human artistry.

## Strategic Focus
- **AI‑powered game development**: Using their generative AI to build an original turn‑based tactics game, demonstrating their technology in practice.
- **Advancing anime video generation**: Expanding from still images to video (Niji Video) to capture the growing demand for AI‑assisted animation.
- **Research‑first approach**: Hiring AI researchers (LLMs, motion generation, video models) to push the boundaries of what AI can do for the anime medium.

## Why Work Here
- **Culture & mission**: A team of passionate anime and game lovers who care about artistic quality. “No‑compromise approach to well‑balanced gameplay married to a truthful love of visual arts.”
- **Work environment**: Remote‑friendly – roles are open to candidates in San Francisco, Tokyo, or fully remote. Fresh graduates are welcome (some positions note “Any (new grads ok)”).
- **Engineering culture**: You’ll work on cutting‑edge generative AI (diffusion models, LLMs, video generation) alongside veteran researchers from Midjourney, Meta, NVIDIA, and Preferred Networks.
- **Perks & highlights**: Opportunity to contribute to a globally used AI platform (niji・journey) and to build an original anime game from the ground up. Flexible location, small team with high ownership.

## Sources
1. [spellbrush.com](https://spellbrush.com/careers) – Career page (company description, values)
2. [ycombinator.com](https://www.ycombinator.com/companies/spellbrush) – Y Combinator profile (founding, batch, team size, HQ)
3. [linkedin.com](https://www.linkedin.com/company/spellbrush) – LinkedIn page (headcount, revenue, funding, locations, recent news)
4. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/spellbrush) – Open roles (tech stack: Unity, TypeScript; remote policy)

## Other roles at Spellbrush

- [HPC/ML Infrastructure Engineer](https://feeny.ai/job/hpc-ml-infrastructure-engineer-spellbrush-san-francisco-zhh2f9af9wcn) — San Francisco, CA
- [3D Game Programmer (Unity)](https://feeny.ai/job/3d-game-programmer-unity-spellbrush-san-francisco-fwee1ea6fp02) — San Francisco, CA
- [AI Anime Researcher - LLM](https://feeny.ai/job/ai-anime-researcher-llm-spellbrush-san-francisco-1tzstywjhh72) — San Francisco, CA
- [AI Anime Researcher - Motion Generation Models](https://feeny.ai/job/ai-anime-researcher-motion-generation-models-spellbrush-san-francisco-sb7f86zn4qvq) — San Francisco, CA
- [Level Designer](https://feeny.ai/job/level-designer-spellbrush-san-francisco-2rn72sf2g34v) — San Francisco, CA
- [Game Programmer (Unity)](https://feeny.ai/job/game-programmer-unity-spellbrush-san-francisco-rt0g3ng467yr) — San Francisco, CA
- [Software Engineer](https://feeny.ai/job/software-engineer-spellbrush-san-francisco-7p9r7r1f6q1b) — San Francisco, CA
- [AI Anime Researcher](https://feeny.ai/job/ai-anime-researcher-spellbrush-tokyo-5pej30ze08je) — Tokyo, Japan
- [AI Infrastructure Engineer](https://feeny.ai/job/ai-infrastructure-engineer-spellbrush-san-francisco-gesa1p6q0qnf) — San Francisco, CA
- [Front-End Engineer (Anime)](https://feeny.ai/job/front-end-engineer-anime-spellbrush-san-francisco-bgraht6gnhf3) — San Francisco, CA