The Tokyo Tier-2 center, which is located in the International Center for Elementary Particle Physics (ICEPP) at the University of Tokyo, is providing computing resources for the ATLAS experiment in the WLCG. Almost all hardware devices of the center are supplied by a lease, and are upgraded in every three years. This hardware upgrade was performed in December 2018. In this presentation, experiences of the system upgrade will be reported. The configuration of the new system will also be shown.