Mobile Game Development Planner

Fidel Consulting KK • Sapporo , Hokkaido • Posted July 12, 2026

About the Role


Appealing Points:


Work on a Popular Live Mobile Game – Contribute to the service maintenance, feature expansion, and continuous improvement of SEGA Net Mahjong MJ, a long-running mobile title for iOS and Android.
End-to-End Development Planning – Participate in specification creation, implementation planning, release management, and live service improvements while collaborating with cross-functional teams.
Gain Experience in GaaS Operations – Work on Game-as-a-Service (GaaS) operations using Unity, planning new features and live events while driving KPI-based product improvements.


Annaul Salary: 3.5 Million yen and Above

Job Responsibilities:


Support the Project Leader in planning and executing development activities.
Create feature overviews, functional specifications, and implementation documentation.
Manage implementation progress and ensure quality throughout the development lifecyc...