HR & Labor Operations Lead

Salary Range: 4500000 to 8000000 (Currency: JPY) (Pay period: per-year-salary)

Mantra株式会社は、「エンターテインメントから「言語の壁」をなくすこと」に挑戦しているグローバルAIスタートアップです。世界中の誰もが、最新のマンガやアニメ、ゲームを同時に楽しみ、国や文化を超えて語り合う。作品への愛やファン同士の交流から生まれる「異文化への敬意」が、やがて世界の相互理解を育む―。そんな平和で笑顔に満ちた未来を描きながら、私たちはAI技術の研究、マンガ翻訳、そして語学学習サービスの開発に取り組んでいます。

具体的には、マンガ・エンターテイメントに特化したAI技術の研究開発を通じて、高速なマンガ翻訳を実現する翻訳ツール『Mantra Engine』、マンガを用いた英語多読学習アプリ『Langaku』などのサービスを提供しています。また、これらの成果により、HONGO AI Award (2019) 、週刊東洋経済『すごいベンチャー100』(2020)、AAMT長尾賞 (2021)、JEITAベンチャー賞 Early edge賞（2022）、『Google Play ベスト オブ 2025 自己成長部門 大賞(Langaku)』等を受賞しています。

Mantra Inc. is a global AI startup dedicated to “breaking down language barriers through entertainment.” We envision a future where people around the world can enjoy the latest manga, anime, and games together, and engage in conversations that transcend national and cultural boundaries. We believe that the “respect for other cultures” born from a love for these works and interactions among fans will eventually foster mutual understanding across the globe. With this vision of a peaceful, smile-filled future in mind, we are committed to researching AI technology, translating manga, and developing language learning services.

Specifically, through R&D in AI technology specialized for manga and entertainment, we provide services such as “Mantra Engine,” a translation tool that enables high-speed manga translation, and “Langaku,” an English extensive reading app that uses manga. Furthermore, these achievements have earned us numerous awards, including the HONGO AI Award (2019), Weekly Toyo Keizai’s “100 Amazing Ventures” (2020), the AAMT Nagao Award (2021), the JEITA Venture Award Early Edge Prize (2022), and the “Google Play Best of 2025 Grand Prize in the Self-Improvement Category (Langaku).”

募集背景/Recruitment Background

組織の拡大とIPOを見据え、労務基盤を「回す」段階から「仕組みとして整える」段階へ進めるための募集です。

現在の労務は、HR責任者と業務委託スタッフで回している状態です。組織には正社員・契約社員・業務委託が混在し、多国籍のメンバーが在籍するため、手続きの標準化やシステム化の余地が大きい状態です。

そこで、労務の実務に加え、課題の洗い出しから改善案の提案、システム選定・導入・定着までを一人でも推進できる方を迎えたいと考えています。指示を待つのではなく、「こうした方がよい」を自ら示し、経営陣と合意して実行まで持ち切れる方を想定しています。




With an eye toward organizational expansion and an IPO, we are seeking a candidate to help transition our HR operations from a phase of “keeping things running” to one of “establishing a robust system.”

Currently, HR operations are managed by the HR Manager and contract staff. Since our organization includes a mix of full-time employees, contract employees, and independent contractors—many of whom are from diverse nationalities—there is significant room for standardizing procedures and automating processes.

Therefore, we are seeking someone who, in addition to handling day-to-day HR operations, can independently drive the entire process—from identifying challenges and proposing solutions to selecting, implementing, and ensuring the successful adoption of new systems. We are looking for someone who, rather than waiting for instructions, proactively suggests “this would be a better approach,” reaches consensus with senior management, and sees the initiative through to completion.

業務内容/Job description

1. 労務運用（正確に回す）

- 勤怠管理、各種申請・手続きの運用
- 入退社手続き、雇用契約・業務委託契約の管理、オンボーディング対応
- 給与計算・支払、社会保険・税金関連の手続き（外部委託先・社労士との連携を含む）
- 定期健康診断、就業規則・36協定など法定労務対応、法改正のキャッチアップ
- 外国籍メンバーの在留資格など、グローバル組織特有の手続き
- 社員からの労務関連の問い合わせ対応（日本語・英語）

2. フロー改善（課題を見つけ、提案し、実行する）

- 現行の労務フローを可視化し、法令リスク・属人化・手戻りなどの課題を洗い出す
- 優先順位をつけた改善案を作成し、経営陣に提案・合意形成する
- 合意した改善を自ら実行し、手順書・社内ルールとして定着させる
- AI・ワークフローツールを活用した定常業務の自動化（社内のAI推進メンバーと連携）

3. 労務システムの導入・変更

- 勤怠・給与・労務管理システム（現行：SmartHR など）の運用設計と見直し
- 新規導入・切り替え時の要件整理、サービス比較・選定、ベンダー調整
- データ移行、設定、テスト、社内への展開・定着までの一連のプロジェクト推進
- 権限管理、雇用形態ごとのデータ整備など、IPOを見据えた内部統制の強化

4. 総務

- デバイス・備品の発注と管理
- オフィスファシリティの管理
- 各種書類の管理

ご経験に応じてお任せしたいこと

- 人事制度・評価制度の運用と改善
- 組織開発、サーベイ運用
- 採用実務・採用広報のサポート

1. Labor Management Operations (Ensuring Accurate Operations)

- Attendance management and handling of various applications and procedures
- Hiring and termination procedures, management of employment contracts and service agreements, and onboarding support
- Payroll calculation and payment, as well as social insurance and tax-related procedures (including coordination with external vendors and certified social insurance and labor consultants)
- Regular health checkups, compliance with statutory labor requirements (such as work rules and Article 36 Agreements), and staying current with legal changes
- Procedures specific to a global organization, such as residency status for foreign employees
- Responding to employee inquiries regarding labor matters (in Japanese and English)

2. Workflow Improvement (Identify Issues, Make Proposals, and Implement Solutions)

- Visualize current HR workflows to identify issues such as legal compliance risks, reliance on specific individuals, and rework
- Develop prioritized improvement proposals, present them to management, and secure consensus
- Proactively implement agreed-upon improvements and embed them as standard operating procedures and internal policies
- Automate routine tasks using AI and workflow tools (in collaboration with the company’s AI promotion team)

3. Implementation and Modification of HR Systems

- Design and review the operations of time and attendance, payroll, and HR management systems (current systems: SmartHR, etc.)
- Define requirements, compare and select services, and coordinate with vendors during new implementations or system migrations
- Lead the entire project process, from data migration, configuration, and testing to internal rollout and adoption
- Strengthen internal controls with an eye toward an IPO, including access control management and data standardization by employment type

4. General Affairs

- Ordering and managing devices and office supplies
- Managing office facilities
- Managing various documents

Responsibilities based on your experience

- Implementing and improving HR and performance evaluation systems
- Organizational development and conducting employee surveys
- Supporting recruitment operations and recruitment communications

必須スキル・経験/Required Skills and Experience

• 労務経験3年以上
• 日本語力：ネイティブレベル
• 英語力：日常会話〜ビジネスレベル（社内公用語が英語のため、日常的な英語使用に抵抗がない方）
• 労務フローを自ら改善した経験（課題の特定から実行・定着までの具体例を説明できること）
• 勤怠・給与・労務管理システムの導入・切り替え、または運用設計に主担当として関わった経験
• 組織を横断した主体的なコミュニケーション・協業能力
• エンタメや漫画・AIへの興味関心
 
• At least 3 years of HR experience
• Japanese proficiency: Native level
• English proficiency: Conversational to business level (Since English is the official language within the company, candidates must be comfortable using English on a daily basis)
• Experience independently improving HR processes (must be able to provide specific examples, from identifying issues to implementation and standardization)
• Experience serving as the primary point of contact for the implementation, migration, or operational design of time and attendance, payroll, and HR management systems
• Ability to proactively communicate and collaborate across organizational boundaries
• Interest in entertainment, manga, and AI

歓迎スキル・経験/Preferred Skills and Experience

• 一人労務、または少人数チームで労務全般を担った経験
• スタートアップにおけるバックオフィス経験
• 労務以外の人事領域の経験
• グローバルな環境、外国籍社員の労務対応経験
• IPO準備企業での労務・内部統制整備の経験
• AIやノーコードツールを活用した業務自動化の経験
• 社会保険労務士資格
 
• Experience handling all aspects of labor and personnel affairs either independently or as part of a small team
• Back-office experience at a startup
• Experience in HR areas other than labor and personnel affairs
• Experience working in a global environment and handling labor and personnel matters for foreign employees
• Experience establishing labor and personnel systems and internal controls at a company preparing for an IPO
• Experience automating business processes using AI and no-code tools
• Certified Social Insurance and Labor Consultant

求める人物像/Ideal Candidate

指示を待たず、自ら課題を見つけて「こうした方がよい」を提案できる方
提案で終わらせず、関係者を巻き込んで実行・定着までやり切れる方
正確さが求められる業務と、改善のスピードを両立できる方
判断に迷う場面で、社労士などの専門家や経営陣に適切に相談できる方
異なる専門性やバックグラウンドを持つ人とのコミュニケーションを楽しめる方
Mantraの事業領域（マンガをはじめとするエンタメ、言語、機械学習）に関心がある方
TryFirst： 何事も挑戦するマインドを持つ方
Learn and Transform： 何事からも学び続ける姿勢を持つ方
Climb Together： 価値観やバックグラウンドの異なる人と前向きに協業できる方
 
• Someone who can identify challenges on their own without waiting for instructions and propose solutions such as “It would be better to do it this way”
• Someone who doesn’t stop at making proposals, but involves relevant stakeholders and sees initiatives through to implementation and adoption
• Someone who can balance the need for precision in their work with the speed required for improvement
• Someone who can appropriately consult with experts (such as certified social insurance and labor consultants) or management when faced with difficult decisions
• Someone who enjoys communicating with people from diverse professional fields and backgrounds
• Someone interested in Mantra’s business areas (entertainment, including manga; languages; and machine learning)
• TryFirst: Someone with a mindset of taking on any challenge
• Learn and Transform: Someone with a mindset of continuously learning from every experience
• Climb Together: Someone who can collaborate positively with people of different values and backgrounds