The Tokyo Tier-2 site, which is located in International Center for Elementary Particle Physics (ICEPP)
at the University of Tokyo, is providing resources for the ATLAS experiment in WLCG. In December 2015,
almost all hardware devices were replaced as the 4th system. Operation experiences with the new system
and ??a migration plan from CREAM-CE + Troque/Maui to ARC-CE + HTCondor will be reported.