NTT Global Data Centers is the world's 3rd largest data center operator and leading NTT DATA Group's data center business. With the advent of generative AI and large-scale language models (LLMs), an environment that can handle high-heat servers is required. In this presentation, we will introduce the implementation record of direct liquid cooling(DLC) for HPC servers in NTT Global Data Center, and introduce our future expansion plans for the Japan market.