Mercari
Product Manager (Customer Support) - Mercari Marketplace
ãããã¯ããããŒãžã£ãŒ(Customer Support) - Mercari Marketplace
Tags: Full-time, 3 YOE, Business Japanese
Minato City, Tokyo, Japanã»Fetched 30+ days ago
Job Description
Team: Product Management

JD in Japanese follows. è±æã®åŸã«åæJDãã芧ããã ããŸãã
Product Manager ([Customer Support: Mercari Marketplace])
- Employment type: Full-time employee
- Work style: Flextime (no core hours)
- Location: Roppongi
For details, please see the application guidelines on our careers site.
About the Mercari Group
Circulate all forms of value to unleash the potential in all people
"With the earth's resources limited, what can we do to build a more abundant society?" In 2013, the flea market app "Mercari" was born out of this sense of purpose that founder Shintaro Yamada developed during a trip around the world. We believe that by circulating all forms of valueânot limited to physical goods and moneyâwe can expand everyone's options to realize what they want to do and to contribute to people and society.
Through the power of technology we connect people around the world and work to realize a world in which the potential of all people can be unleashed. For the Mercari Group's direction, please see the Mercari Culture Doc.
Organization / Team Mission
In the Marketplace business, we aim to realize a global marketplace that creates new valueâdriving the growth of diverse businesses through the creation of user value. Starting with the operation of Mercari, Japan's largest flea-market service, we advance the Mercari Group's mission through our cross-border business and various new ventures.
CS Product's mission is to provide the best platforms and tools for the user service team to support valued users. While addressing diverse user inquiries and adding new services, it is essential to achieve efficient functionality expansion, swift problem resolution, and a seamless user experience at a high standard. Leveraging data and analytics to drive product decision-making and enhance customer support productivity is crucial.
Under a development structure that assumes AI, we pursue both speed and the maximization of user value at the same time. Product Managers concentrate on the most important problem discovery (Discovery) and business outcomes (Outcome), and move the product forward in small, autonomous teams.
- For details on Mercari's mission and values, please see here.
Responsibilities
As a Product Manager, you will own everything from strategy to execution for Customer Service, leading a cross-functional team made up of engineers, designers, data analysts, and others. Under an AI-powered development structure, you will take end-to-end ownership and drive everything from problem discovery to business outcomes.
Key Responsibilities
- 1. Define the vision, strategy, and roadmap
- Define the ideal state of the CS domain and formulate a medium- to long-term vision and an actionable roadmap.
- Based on quantitative/qualitative data and market/competitive trends, decide the priorities most directly tied to business growth while building alignment with the leadership team and related divisions
- 2. Discovery and generating a high-quality backlog
- Integrate diverse inputsâquantitative, qualitative, market, and competitiveâto continuously supply a high-quality product backlog equipped with testable hypotheses and success conditions
- Use generative AI to accelerate research and prototyping and to run validation cycles faster
- 3. Leading product development
- Under a structure in which engineers lead development end-to-end, the PdM concentrates on hypothesis validation and key decisions
- 4. Launch & Learning (designing for reach, usage, and learning)
- Don't treat the release as the finish line: lead GTM design including Push/promotion/PR and coordination with related divisions (Marketing/CRM/CS, etc.)
- Monitor resolution rates of inquiries and productivity improvement metrics, and design the Next Action.
- 5. Collaboration with stakeholders
- Coordinate requirements and prioritize with various teams involved in CS, such as the CS Operations/Knowledge Management team, Sales, and New Business representatives
- Reporting to and building consensus with the management team
Examples of tools used on the job
- General chat / generative AI: Gemini, Claude
- Knowledge QA / research support: Notion AI, NotebookLM (upload documents + Q&A)
- Development support (code completion / coding agents / IDE): Cursor, GitHub Copilot, Claude Code, Devin, Codex, Gemini Code Assist
- Workflow automation / AI app development (no-code / low-code): n8n, Dify
Unique Challenges
- CS Product is a team that evolves Mercari's customer support experience through technology. It plans and develops systems to quickly resolve user issues through the most optimal channels.
- In one of the largest marketplaces in Japan, with millions of inquiries occurring monthly, the team simultaneously drives multiple initiatives such as AI-powered automated responses, virtual agents, and back-office automation. Each initiative has the potential to improve the user experience for tens of thousands of users, providing an environment where one can be involved end-to-end, from product development to operational outcomes.
- Actively adopting new technologies, including AI, and continuously transforming the very nature of customer support is a unique challenge for this team. Additionally, aiming to create "products that inherently reduce inquiries," the team collaborates daily with Mercari's development teams to drive continuous improvement.
- Under a development structure that assumes AI, you can raise the resolution of the team's discussions and decisions starting from working prototypes, freeing the PdM to focus on the Discovery and Outcome they should truly concentrate on. Beyond the data platform and product development, you can move the product forward with broad discretionâincluding planning and driving new user experiences.
Requirements
- Required experience / skills
- You resonate with the mission and values of the Mercari Group and of each company
- You can demonstrate consistent ownership from product discovery through delivering value to users, using AI
- Experience using AI tools for research, hypothesis validation, and prototyping; integrating data/user understanding; and improving the quality and speed of decision-making
- Experience taking responsibility for business outcomes such as KPIs (not the number of features) and leading the full cycle of discover â build â learn
- Experience not stopping at release, but designing through "reach, usage, and learning"âdriving GTM, cross-divisional coordination, and post-launch learning
- Experience in product management for internet services (3+ years)
- Basic knowledge of software development (agile, etc.) and experience collaborating with engineering teams
- Experience extracting insights through data analysis using SQL, etc.
- Preferred experience / skills
- Cross-boundary skills: a practical feel for at least one of BE/Frontend/Design/Data, usable for building prototypes and for dialogue with engineers
- Experience in both 0â1 (new launches) and 1âN (improving existing products)
- Experience in stakeholder coordination and alignment with Legal/BizOps/leadership/external partners, etc.
- Understanding of A/B testing and experience making decisions based on test results
- Experience in planning, designing, or operating chatbot/conversational AI products (e.g., dialogue flow design, intent classification, response accuracy improvement)
- Experience in designing and improving KPIs in the CS automation domain, such as self-resolution rates and user satisfaction
- Experience in building and improving the operation of knowledge bases and FAQs
- Understanding of CS Ops (Customer Service Operations) tasks and experience in collaborating with BPOs
- Work experience using English, or experience in product development with multinational teams
- Language
- Japanese: Proficient (CEFR B2) or above required
- English: Independent (CEFR B1) or above preferred (those able to acquire it within 6 months of joining)
- â» For details on CEFR, please see here.
Open positions in the Marketplace Product division
In the Product division of the Marketplace business, we are hiring across multiple positions to realize the Mercari Group missionâ"Circulate all forms of value to unleash the potential in all people"âthrough the power of product.
Get to know the Mercari Group
- Careers site https://careers.mercari.com/
- Mercan: https://mercan.mercari.com/
- SNS: X / Linkedin
- https://careers.mercari.com/mercan/articles/59198/
- https://careers.mercari.com/mercan/articles/57597/
- https://careers.mercari.com/mercan/articles/44184/
About the selection process
At the Mercari Group, we value resonance with and embodiment of our mission and values. To build an organization that maximizes the total value our members create, we want to accurately understand each candidate's experience and skills.
Selection flow
- Document screening
- Interviews: multiple rounds depending on the position
- Reference check: online response format (conducted around the final interview)
- Offer: decided based on the results of the final interview and the reference check
â» For details, please see this page.
Equal opportunity in our selection process
At Mercari, we aim to realize a society in which an individual's potential is not predetermined by their background and everyone has the opportunity to freely create value. We believe that "Inclusion & Diversity" is indispensable to realizing our mission.
In our hiring activities as well, so that people of diverse backgrounds who resonate with Mercari's mission and values can join us, we promise to eliminate all discrimination based on age, gender, sexual orientation, race, religion, physical ability, or any other attribute.
For details, please see the I&D statement.
Please also review our Privacy Policy when you apply.
Product Manager / ãããã¯ããããŒãžã£ãŒ(Customer Support) - Mercari Marketplace
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