Following the successful commissioning of spacecraft and payload, XRISM will undergo a 6-months Performance Verification (PV) Phase. The goal of this phase is to showcase the XRISM transformational science, while providing the scientific community worldwide with a comprehensive set of experiments thoroughly verifying the capability of the mission to fulfill all its scientific goals.

PV Target List | XRISM for Researcher
https://xrism.isas.jaxa.jp/research/proposer/approved/pv/index.html