Mercari Group is hiring Product Manager interns for Mercari, Merpay, or Mercoin. Candidates must be able to start as new graduates in Oct 2027 or Apr 2028, work 20+ hours/week for 2–3 months, and be located in Japan. Responsibilities include product planning, writing specifications, collaborating with engineers/designers/customer service, conducting surveys/research, and leading cross-functional projects. Japanese proficiency (CEFR C1) and English (CEFR B1) are required. Visa support and travel/accommodation arrangements are offered for overseas residents.