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Farewell message from Osamu Fukushima

Our colleague, Osamu Fukushima, will be joining the Faculty of Science and Engineering, Doshisha University, as an Assistant Professor. We will all miss him and wish him the best of luck in his new endeavor. Here is a message from Osamu: <i>I would like to express my sincere gratitude to everyone at iTHEMS as I leave my position as a Special Postdoctoral Researcher. During my time at iTHEMS, I greatly benefited from its open and interdisciplinary research environment. My research has mainly focused on theoretical and mathematical physics, but interactions with researchers from a wide range of fields encouraged me to broaden my perspective and explore new research directions.</i> <i>I especially appreciated the many stimulating discussions, seminars, and informal conversations at iTHEMS. They often gave me new ideas and perspectives that I would not have encountered within my own field.</i> <i>I would like to thank all the researchers, assistants, and staff for their support and for making iTHEMS such a welcoming place to work. Although I am leaving iTHEMS, I hope to stay connected and continue interacting and collaborating with its members in the future. It has been a great pleasure to be part of the iTHEMS community.</i>

2026-10-01
UBCでワークショップ「Quantum Information: Entanglement of Mathematics & Physics」を開催

2026年9月21日から23日にかけて、カナダ・バンクーバーのUniversity of British Columbia（UBC）において、ワークショップ「Quantum Information: Entanglement of Mathematics & Physics」を開催しました。本ワークショップは、量子情報を共通のキーワードとして、数学と物理学の研究者が分野を越えて議論することを目的としたものです。作用素環、量子リソース理論、量子重力、物性物理、量子計算、量子誤り訂正など幅広いテーマを取り上げ、それぞれの分野に現れるエンタングルメントや量子情報の背後にある数学的構造について議論しました。 iTHEMS、UBCをはじめ、日本とカナダの大学・研究機関から約40名の研究者が参加し、3日間で21件の講演が行われました。講演に加え、各日には十分なディスカッションの時間が設けられ、異なる研究分野の参加者がそれぞれの視点や研究手法を共有しながら、活発な意見交換を行いました。特に、各参加者の研究テーマを「量子情報」という共通の視点から捉えることで、異なる分野の知見や手法が相補的に貢献し合う具体的な場面が数多く見られました。日本とカナダから幅広い分野の研究者が集まったことで議論に厚みが生まれ、率直な疑問や問題提起に対して分野を越えて応答し合う、有機的な研究交流が実現しました。最終日には、「Entanglement across mathematics and physics; future iTHEMS–UBC collaboration」をテーマとする全体討論も行われました。今回の交流を今後のiTHEMSとUBCの研究協力につなげていく可能性について議論し、継続的な研究交流やMOU（連携協定）の締結に向けた関係を築く上でも、有意義な機会となりました。本ワークショップは、量子情報を接点として数学と物理学のさまざまな分野を結びつけ、新たな研究交流や共同研究の可能性を広げるとともに、iTHEMSとUBCの連携をさらに深める機会となりました。

2026-09-30
数理遺伝学理研ECL研究ユニットがOISTのMirror Labに参画

iTHEMSのシュパイデル玲雄理研ECL研究ユニットリーダーが率いる数理遺伝学理研ECL研究ユニットは、沖縄科学技術大学院大学（OIST）、マックス・プランク研究所、カロリンスカ研究所とともに、OISTの「Mirror Lab」に参画しました。 Mirror Labは、OISTと国内外の研究機関が長期的な研究協力関係を構築するための枠組みです。共同研究や人材交流、若手研究者の育成などを通じて、各研究グループの専門性を生かした継続的な連携を推進します。今回設立された「The Evolutionary History of Archaic and Modern Humans Mirror Lab」では、OIST、マックス・プランク研究所、カロリンスカ研究所、RIKENの研究グループが連携し、ネアンデルタール人やデニソワ人、現生人類のゲノム情報をもとに、人類の進化や集団の歴史について研究します。特に、古代人類と現生人類の間の遺伝的交流や、日本列島を含む現生人類の比較的新しい集団史などを明らかにすることを目指しています。同ユニットは、集団遺伝学的解析に関する専門性を生かし、現代および古代のゲノム解析を通じて、人類の移動、混合、進化に関する研究に貢献します。

2026-09-29
AI for Science Summer School 2026 Held on August 25–27, 2026

The AI for Science Summer School was held on August 25–27, 2026, at RIKEN Wako Campus, with online participation via Zoom. Jointly organized by the AI as Science Team and the DEEP-IN Working Group, the three-day school brought together more than 40 participants for lectures and hands-on coding sessions exploring how artificial intelligence can support scientific research. The program focused on three practical questions concerning where AI can help address scientific problems, how to choose appropriate methods, and how to apply them effectively. Masato Taki (Rikkyo University/RIKEN) introduced machine learning fundamentals, and Lingxiao Wang (RIKEN/The University of Tokyo) discussed generative modeling. Vinicius Massami Mikuni (Nagoya University) presented foundation models and parameter inference. Naoya Takeishi (The University of Tokyo) covered simulation-based inference. Akinori Tanaka (RIKEN) and Conglong Li (Google DeepMind) explored large language models and their applications to scientific discovery. Hands-on tutorials complemented the lectures. Tutors included Yang-yang Tan (The University of Tokyo), Jinyang Li (KEK/RIKEN), Victor Kawasaki-Borruat (EPFL), and Jingzong Zhang (Fudan University). The sessions covered supervised and unsupervised learning, generative models, data generation, and AI-assisted research workflows. These tutorials connected the lecture material with practical implementation. By combining conceptual introductions with practical exercises, the school offered participants an opportunity to explore how AI methods could be incorporated into their own research. Its emphasis on scientific questions connected the different topics, from interpreting data and generating samples to assisting the research process itself. We thank all lecturers, tutors, participants, and iTHEMS staff for their contributions and support. Reported by Lingxiao Wang

2026-09-25
エクサスケール・スーパーコンピュータとAIを駆使した天の川銀河シミュレーションが2026年ゴードン・ベル賞ファイナリストに選出

理化学研究所（理研）数理創造研究センター（iTHEMS）数理基礎部門の平島敬也基礎科学特別研究員、東京大学大学院理学系研究科の藤井通子教授、森脇可奈助教、原田直人特任研究員、同情報基盤センター三木洋平准教授、神戸大学大学院理学研究科の斎藤貴之准教授、牧野淳一郎特命教授、フラットアイアン研究所デニス・ボルウェグスタッフ・エンジニア、筑波大学計算科学研究センターの吉川耕司准教授、東北公益文科大学公益学部公益学科の平居悠講師、北海道大学大学院理学研究院岡本崇教授、バルセロナ大学宇宙科学研究所朝野哲郎研究員らの国際共同研究グループによる、複数のGPUスーパーコンピュータを用いた超大規模な天の川銀河シミュレーションの研究成果が、米国計算機学会（ACM）の2026年ゴードン・ベル賞の最終候補（ファイナリスト）に選出されました。ゴードン・ベル賞は、高性能並列計算を科学・技術分野に応用し、特に顕著な成果を上げた研究グループに与えられる、高性能計算（HPC）分野を代表する賞です。

2026-09-24
Farewell message from Yuto Yamamoto

Our colleague, Yuto Yamamoto, will be joining the Department of Mathematics, School of Science, Institute of Science Tokyo as an Assistant Professor starting in October 2026. We will all miss him and wish him the best of luck in his new endeavor. Here is a message from Yuto: <i>I am very grateful for the opportunity to have been a member of iTHEMS. During my time here, I enjoyed the stimulating research environment and many opportunities to interact with researchers from different fields.</i> <i>I would like to thank all the members and administrative staff of iTHEMS for their support and for making my time here productive and enjoyable. I have learned a lot from seminars, discussions, and informal conversations with colleagues.</i> <i>Although I am leaving iTHEMS, I hope to stay in touch and to have opportunities to meet and collaborate again in the future. I wish iTHEMS and all its members continued success.</i> <i>Thank you very much for everything.</i>

2026-09-15
Farewell message from Kai Murai

Our colleague, Kai Murai, will be joining Tohoku University as an Assistant Professor starting in October 2026. We will all miss him and wish him the best of luck in his new endeavor. Here is a message from Kai: <i>At the end of September, I will leave iTHEMS and move to Tohoku University as an assistant professor.</i> <i>I joined iTHEMS as an SPDR this April. Although my time here was short, it was a very stimulating experience. I especially appreciated the environment where researchers from various fields worked in the same place. It was interesting to be surrounded by research on topics quite different from my own, and I also enjoyed the opportunities to talk with researchers from other fields.</i> <i>I am very grateful to the iTHEMS members who talked with me, as well as to the assistants for all their support. I will come back to iTHEMS for workshops and other occasions, and I look forward to seeing many of you again.</i>

2026-09-15
JST-ASPIRE Symposium Held in Palo Alto

On July 24, 2026, the JST-ASPIRE Symposium, “Strengthening Japan–U.S. Research Collaboration through International Talent Circulation,” was held at the Japan Innovation Campus in Palo Alto, California. Organized by the Japan Science and Technology Agency (JST), the symposium brought together representatives of the Japanese government, principal investigators of ASPIRE projects, early-career researchers conducting research in the United States, and U.S.-based researchers. The program focused on research activities supported by ASPIRE, the experiences of early-career researchers working abroad, and future opportunities for Japan–U.S. research collaboration. A panel discussion also addressed how international researcher mobility can contribute to strengthening research capabilities and building sustainable international networks. Four young researchers participating in the RIKEN–Berkeley Mathematical Quantum Science Initiative—Yuuka Kanakubo, Gabriele Di Ubaldo, Haruki Emori, and Shoto Aoki—gave a joint presentation. They introduced their respective research activities and shared experiences gained through conducting research in the United States, as well as their perspectives on future research and career development. Their diverse research areas, ranging from high-energy and nuclear physics to quantum gravity, quantum information, and lattice gauge theory, reflect the broad scope of the RIKEN–Berkeley collaboration. The symposium provided an opportunity to introduce the activities of the RIKEN–Berkeley Mathematical Quantum Science Initiative within the broader ASPIRE program and to consider the importance of sustained researcher exchange between Japan and the United States. Reported by Shuntaro Aoki

2026-09-15
Masason Foundation Summer Program Visit to the RIKEN–Berkeley Center on August 11, 2026

Participants in the Masason Foundation’s summer program visited the RIKEN–Berkeley Center at the University of California, Berkeley, on August 11, 2026. The summer program provides young participants with opportunities to broaden their perspectives through visits to universities, research institutions, and other organizations, and through direct interactions with researchers and professionals. The visit began with a tour of the UC Berkeley Physics Department, including an introduction to its history and research environment. This was followed by short presentations by researchers, including Shoto Aoki, Yuka Kanakubo, Gabriele Di Ubaldo, and Akira Dohi, who introduced their research activities to the participants. In the latter part of the program, the participants visited several experimental laboratories at UC Berkeley. Through the presentations, discussions, and laboratory visits, they had an opportunity to learn about a broad range of research activities and to experience firsthand the environment in which cutting-edge research is carried out. The visit provided a valuable opportunity for the young participants to interact directly with researchers at RIKEN and UC Berkeley and to gain a broader perspective on scientific research and possible future career paths. Reported by Shuntaro Aoki

2026-09-08
From Vietnam to Korea: A Summer of Quantum Computing

Duc-Truyen Le, a graduate student at Saitama University, is currently affiliated with iTHEMS as an International Program Associate (IPA). This summer, he participated in a series of quantum computing activities in Vietnam and Korea. In Vietnam, his team received an Honorable Mention at an international quantum computing hackathon involving participants from across Southeast Asia. We asked Duc-Truyen to share his experience with the iTHEMS community: From July 9 to 31, I stayed in Vietnam, mainly to prepare for and participate in a major quantum computing event that brought together scientists, industry leaders, policymakers, and government representatives. The event aimed to strengthen collaboration and promote investment in quantum technologies across both the public and private sectors. The program consisted of a series of activities held over more than a week, including workshops, discussions, networking events, and competitions. One of the highlights was the International Hackathon on Quantum Computing for Social Good (QC4SG Vietnam 2026 / 2nd SEA Quantathon), which brought together participants from across Southeast Asia. The competition was highly selective, with more than 500 initial applications. Selected teams went through a training phase before the finalists were invited to Vietnam to present their projects. For more information about the competition, please see the related link below. Among more than 20 finalist teams, comprising around 100 participants, our team, QuanWatt, was honored to receive an Honorable Mention. It was a rewarding experience and a valuable opportunity to exchange ideas with participants from different backgrounds. Our project explored how quantum computing could contribute to the analysis of modern power systems, which are becoming increasingly complex with the growing integration of renewable energy sources and smart-grid technologies. Although considerable work remains before such approaches can be applied in practice, it was encouraging to see increasing interest from both academia and industry in practical applications of quantum computing. Following the program in Vietnam, I traveled to Korea, where I attended a course at the Institute for Basic Science (IBS) from August 1 to 8 on “Quantum Computing for Quantum Field Theory.” This provided another valuable opportunity to learn about the rapidly developing connections between quantum computing and fundamental physics. Overall, these experiences in Vietnam and Korea were both memorable and intellectually stimulating. I am very grateful for the opportunity to participate and for the continued support I have received from iTHEMS.

2026-09-01

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数理創造研究センター（RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences, 略称 iTHEMS アイテムス）は、理論科学・数学・計算科学の研究者が分野の枠を越えて基礎研究を推進する、国際研究拠点です。2025年4月1日にプログラムからセンターへと組織改編されました。iTHEMSでは、「数理」を軸とする分野横断的手法により、宇宙・物質・生命の解明や、社会における基本問題の解決を目指しています。

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