In order to cope with the increased demand for air transportation, air traffic system modernization projects have been undertaken in many countries. In future air traffic, the concept of time-based management (TBM) is being considered to improve the efficiency of air traffic flow. However, TBM is currently only a concept and it is not clear how it should be implemented in practice. This study therefore identifies the potential needs of stakeholders for time-based management. We created a stakeholder value network (SVN) for the stakeholders involved in the next generation air traffic management system and identified the primary stakeholders. We also conducted systemized interviews based on the Kano model with the primary stakeholders to identify their needs. By analyzing the SVN and interview results, the discussion was conducted on the potential needs of the primary as well as secondary stakeholders for a future control system to realize TBM.