Technical Program

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Workshop Day 1 (Tue., October 14th, 2025)

Time	Session/Presentation Title	Presenter
9:40-10:10	Registration
10:10-10:30	Opening Session Chair: Hiroyuki Takizawa (Tohoku University)
10:10-10:15	Opening Address: Welcome to The 40th Workshop on Sustained Simulation Performance	Hiroyuki Takizawa (Tohoku University)
10:15-10:20	Greetings	Takuo Suganuma (Tohoku University)
10:20-10:30	Towards Fugaku NEXT: Japan’s HPC Policy and AI for Science	Kiyoshi Kurihara (MEXT)
10:30-11:45	Session 1: HPC Trends I Chair: Kazuhiko Komatsu (Tohoku University)
10:30-10:55	Gigafactories and HPC	Michael Resch (HLRS)
10:55-11:20	The Cyberscience Center not only for Cyberscience.	Hiroyuki Takizawa (Tohoku University)
11:20-11:45	Convergence of HPC & AI will or won’t	Sabine Roller (DLR)
11:45-13:00	Lunch
13:00-14:25	Session 2: Bridging Paradigms Chair: Michael Resch (HLRS)
13:00-13:10	Greetings	Takafumi Aoki (Tohoku University)
13:10-13:35	Vector Processing as a Platform for Simulating Ising Machines: Bridging Classical and Quantum Paradigms	Hiroaki Kobayashi (Tohoku University)
13:35-14:00	Architecting the Next 20 Years: Lessons from the Cybermedia Center	Shinji Shimojo (Aomori University)
14:00-14:25	My Research Shift from CFD to Biomechanics: Lessons from WSSP	Ryutaro Himeno (Juntendo University)
14:25-14:45	Break
14:45-16:00	Session 3: HPC Applications I Chair: Susumu Date (The University of Osaka)
14:45-15:10	Benchmarking CFD Simulations: Comparison Challenges on Heterogeneous HPC Systems	Flavio Galeazzo (HLRS)
15:10-15:35	A journey through the beautiful landscape of weather simulations performed on Hornet, Hazel Hen, and Hawk (Online)	Thomas Schwitalla (University of Hohenheim)
15:35-16:00	Exploring the Solution of Quadratic Unconstrained Binary Optimization Problems with Different Quantum Hardware	Qifeng Pan (HLRS)
16:00-16:20	Coffee Break
16:20-17:35	Session 4: Future HPC Systems Chair: Thomas Ludwig (DKRZ Hamburg)
16:20-16:45	Efforts Toward GPU Computing on the Earth Simulator	Akira Masago (JAMSTEC)
16:45-17:10	The Next Generation Vector with RISC-V, and Global Collaboration	Masaaki Hara (NEC)
17:10-17:35	FugakuNEXT Project: Challenges for Post-Exascale Supercomputing in Japan	Kentaro Sano (Riken R-CCS)

Workshop Day 2 (Wed., October 15th, 2025)

Time	Session/Presentation Title	Presenter
9:30-10:00	Registration
10:00-12:00	Session 5: HPC Trends II Chair: Shintaro Momose (NEC)
10:00-10:25	Do not call your LLMs conscious – they do not like that!	Thomas Ludwig (DKRZ Hamburg)
10:25-10:50	Compute and Storage Infrastructural Challenges Towards Promotion and Acceleration of Data-driven Research at the University of Osaka	Susumu Date (The University of Osaka)
10:50-11:15	targetDART - Offloading of GPU Tasks across MPI processes for Load Balancing	Jose Gracia (HLRS)
11:15-11:40	Research Information Infrastructure (RII) and Related Product	Ayano Nakao (NEC)
11:40-12:00	Tohoku University Research Data Lake IZUMI Powering Data-driven Research	Takaki Nakamura (Tohoku University)
12:00-13:00	Lunch
13:00-14:15	Session 6: HPC Applications II Chair: Matthias Meinke (RWTH Aachen)
13:00-13:25	Towards Future High-Performanc Computing	Johannes Gebert (HLRS)
13:25-13:50	Modeling Micromotion: Micro-FE Analysis of Bone-Screw Interactions	Benjamin Schnabel (HLRS)
13:50-14:15	Rootless Kubernetes on HPC: Early Experience and Future Outlook	Kamil Tokmakov (NEC Deutschland)
14:15-14:35	Coffee Break
14:35-16:15	Session 7: HPC Applications III Chair: Jose Gracia (HLRS)
14:35-15:00	GPU/APU Porting Results of a Cartesian Mesh based Finite-Volume Solver	Matthias Meinke (RWTH Aachen)
15:00-15:25	Introduction of Plasma Simulator and tips learned from porting fusion applications to MI300A (Cancelled)	Haruki Seto (QST)
15:00-15:25	SPLISS – LINEAR ALGEBRA FOR IMPLICIT CFD METHODS	Arne Rempke (DLR)
15:25-15:50	VH-VE Implementation for Direct Numerical Simulation of Weakly Compressible Turbulence on SX-Aurora TSUBASA	Mitsuo Yokokawa (Tohoku University)
15:50-16:15	Challenges and solutions in the porting of a finite difference high-fidelity CFD code to HLRS’s Hunter system	Tobias Gibis (HLRS)
16:15-16:25	Concluding Remarks