The supervisory control system and data acquisition system (SCSDAS) has the following functions:

1. plant monitoring;
2. discharge sequence management;
3. plasma real-time control;
4. device protection;
5. discharge result data archive, storage, and database management.

There is a separate safety interlock system to avoid inappropriate access to the plant. This independent system is monitored by the SCSDAS.

The existing supervisory control and data acquisition system of JT-60U is being modified so that various kinds of advanced tokamak experiments can be performed more flexibly and efficiently. Major points of difference with respect to the existing system include a significantly longer discharge time and issues related to the control of the superconducting magnet.