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Feasibility Study on Operational Computing Systems for Next-Generation Computing Infrastructure (from November 7, 2025)

Japanese

The RIKEN Center for Computational Science (R-CCS) has been selected as the lead institution for the “Feasibility Study on Operational System (Computing) Development Plan” under MEXT’s “HPCI Development Plan Feasibility Study Program.” This project aims to examine development policies for a next-generation HPCI operational system that will enable the next flagship system after the FugakuNEXT system, the diverse computing systems operated by HPCI sites across Japan to work together in an integrated manner and maximize scientific outcomes in the FugakuNEXT era and beyond.

Outline of the Initiative

In parallel with the development and deployment of the new flagship system, this project conducts the feasibility studies necessary to obtain insights for formulating more concrete development plans. The goal is to ensure that the flagship system and the various HPCI systems can operate in concert to maximize overall scientific outcomes, while also taking into account the future evolution of computational science technologies with an eye toward subsequent flagship systems.

In this project, we recognize that, owing to the rapid progress of AI technologies—exemplified by the explosive growth of generative AI—the importance of AI for Science, which combines conventional large-scale simulations with AI-driven automated experimentation, is increasing. As a result, the required computing resources are becoming more diverse and sophisticated. Positioning this work as an “Operational System (Computing system) Development Plan,” the project therefore investigates computer architectures, system software, and next-generation application development that can fully exploit these systems—viewed as essential elements for allowing the next flagship system after FugakuNEXT and the various HPCI systems to work together and maximize scientific and technological achievement — and proposes concrete development plans for their implementation.

FS3.0: Overview(Lead organization: RIKEN R-CCS)
FS3.0: Overview(Lead organization: RIKEN R-CCS) (Please Click to open the PDF file (approx. 1.4MB).)

Scope of the Study

Architecture Study

In collaboration with participating vendors, we will investigate advanced technologies such as next-generation semiconductor technologies, 2.5D/3D/3.5D stacked packaging, and chip-to-chip optical interconnects, and study possible HPCI system configurations in the FugakuNEXT era.

System Software Study

We will investigate the system-software ecosystem that next-generation HPCI systems should provide, and consider succession strategies for software development for Fugaku, FugakuNEXT, and systems beyond FugakuNEXT (ensuring sustainable evolution). Based on technology trends in architectures and applications, we will also examine the software ecosystem required to operate future HPCI systems in an integrated manner across sites (ensuring cross-cutting deployment).

Application Study

We will investigate trends in the use and development of innovative applications that will drive future HPC utilization, with the aim of clarifying, from the application side, the functional and performance requirements for next-generation computing infrastructure. Looking ahead to around 2030, we will work with a broad user community—from academia to industry—to envision the landscape of next-generation HPC applications.

Project Organization

FS3.0: Project Organization

FS3.0: Project Organization (Please click the image to expand.)

Feasibility Study Steering Group (Group Leader: Kento Sato (RIKEN))

Architecture Group (Group Leader: Kazuhiko Komatsu (Tohoku University))

  • Architecture Subgroup 1 (Subgroup Leader: Joshua Fryman (Intel Corporation))
  • Architecture Subgroup 2 (Subgroup Leader: Dan Ernst (NVIDIA Corporation))
  • Architecture Subgroup 3 (Subgroup Leader: Fumiki Negishi (HPE))
  • Architecture Subgroup 4 (Subgroup Leader: Naoki Shinjo (Fujitsu Limited))
  • Architecture Subgroup 5 (Subgroup Leader: Shintaro Momose (NEC Corporation))

System Software Group (Group Leader: Keichi Takahashi (Osaka University))

  • HPC Programming and Communication Environment Subgroup (Subgroup Leader: Norihisa Fujita (University of Tsukuba))
  • Advanced Accelerator Programming Environment Subgroup (Subgroup Leader: Takaaki Miyajima (Meiji University))
  • Numerical Library Subgroup (Subgroup Leader: Takeshi Fukaya (Hokkaido University))
  • Storage and File System Subgroup (Subgroup Leader: Osamu Tatebe (University of Tsukuba))

Application group (Group Leader: Rio Yokota (RIKEN))

  • Next-Generation Application Needs Study Subgroup (Subgroup Leader: Yohei Miki (The University of Tokyo))
  • Next-Generation Application Development Methodology Study Subgroup (Subgroup Leader: Tetsuya Hoshino (Nagoya University))

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