NTT FACILITIES Inc. (Headquarters: Minato-ku, Tokyo; President and CEO: Susumu Kawaguchi; hereinafter referred to as NTT FACILITIES) has begun developing a new construction method for data centers that significantly shortens the application, design, and construction periods. This method involves modularizing buildings and equipment, and constructing data centers by assembling components produced in factories at the site (prefabrication). By standardizing the process from design to construction, the period from application and design to construction for large-scale data centers of tens to hundreds of MW for hyperscalers will be reduced by up to approximately 50% compared to conventional methods. Figure 1: Conceptual image of the data center model "Hyper Ready ModuleTM" Overview In recent years, the demand for data centers has been rapidly expanding, driven by the widespread adoption of generative AI and the advancement of ICT services. However, in Japan, data center construction often takes 3 to 4 years from the start of design to completion, making the prolonged design and construction period a significant challenge. Contributing factors include the procedures based on the Building Standards Act to address Japan's unique seismic risks and compliance with local government ordinances, as well as a shortage of labor in the construction industry. Furthermore, the performance of IT servers has dramatically improved recently, leading to significant changes in server specifications during the period from design to completion. This results in frequent design modifications and re-evaluations for data centers. In response to these challenges, NTT FACILITIES has begun developing a data center model (Hyper Ready ModuleTM) (*2) that modularizes building structures and equipment as much as possible, and constructs them by assembling factory-produced components on-site (prefabrication). This model aims to achieve a total project duration of approximately two years for large-scale