Kawahara Takayuki 河原尊之

Researcher Number	80416990
Other IDs	https://orcid.org/0000-0002-7130-3397
Affiliation (Current)	2026: 東京理科大学, TUS SciTech共創推進本部, 教授
Affiliation (based on the past Project Information) *help	2019 – 2025: 東京理科大学, 工学部電気工学科, 教授
Review Section/Research Field	Principal Investigator Basic Section 21060:Electron device and electronic equipment-related
Keywords	Principal Investigator イジングマシン / 量子コンピュータ / 多ビット幅相互作用 / 多値スピン / 組合せ最適化問題 / スケーラビル / スケーラブル化 / イジングLSI / スケーラブル / 全結合 … More / 半導体メモリ / ＭＲＡＭ / 読み出しディスターブ / ＳＯＴ－ＲＡＭ / スピン軌道相互作用 / 不揮発メモリ / 読出しディスターブ / スピン軌道トルクRAM / 両方向読み出し / SOT-MRAM / ディスターブ低減 / MRAM Less

Research Projects
(3 results)
Research Products
(25 results)

Development of elementary technologies for simultaneous update and higher precision of fully coupled Ising LSI systemsPrincipal Investigator
- Principal Investigator
  
  河原尊之
- Project Period (FY)
  2025 – 2027
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 21060:Electron device and electronic equipment-related
- Research Institution
  Tokyo University of Science
Research on the creation and evaluation of high-performance scalable fully coupled Ising machine LSIPrincipal Investigator
- Principal Investigator
  
  Kawahara Takayuki
- Project Period (FY)
  2024
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 21060:Electron device and electronic equipment-related
- Research Institution
  Tokyo University of Science
Study on new read-disturbance mechanism and its solution in Spin-Orbit Torque RAMPrincipal Investigator
- Principal Investigator
  
  Kawahara Takayuki
- Project Period (FY)
  2019 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 21060:Electron device and electronic equipment-related
- Research Institution
  Tokyo University of Science

All 2025 2024 2022 2021 2020

All Journal Article Presentation Book

[Book] 人工知能チップ回路入門2024
- Author(s)
  河原尊之
- Total Pages
  208
- Publisher
  コロナ社
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Dual Scalable Annealing Processing System That Scales Number of Spins and Interaction Bit Width Simultaneously2025
- Author(s)
  Cui Dong、Megumi Taichi、Endo Akari、Kawahara Takayuki
- Journal Title
  
  IEEE Access
  
  Volume: 13 Pages: 52592-52606
- DOI
  10.1109/access.2025.3553542
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Efficient Implementation of Parallel Annealing Method with Heisenberg Model2024
- Author(s)
  Kanai Kazuma、Kawahara Takayuki
- Journal Title
  
  Proceedings of the IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
  
  Volume: 1 Pages: 55-59
- DOI
  10.1109/apccas62602.2024.10808590
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Implementation and Evaluation of Two Independent Ising Machines on Same FPGA Board by Reducing Number of Interactions Inside Ising Machine2024
- Author(s)
  Kitahara Shinjiro、Megumi Taichi、Endo Akari、Kawahara Takayuki
- Journal Title
  
  IEEE Access
  
  Volume: 12 Pages: 145530-145539
- DOI
  10.1109/access.2024.3471695
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Proposal and Validation of a Dual Scalable Annealing Processing System That Simultaneously Scales Capacity and Precision2024
- Author(s)
  Cui Dong、Megumi Taichi、Endo Akari、Kawahara Takayuki
- Journal Title
  
  Proceedings of the IEEE International Conference on Microelectronics (ICM 2024)
  
  Volume: 1 Pages: 1-6
- DOI
  10.1109/icm63406.2024.10815759
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Proposal and Validation of Annealing-processor-calculation Method Using Error-diffusion Rounded Interaction Matrix2024
- Author(s)
  Cui Dong、Kawahara Takayuki
- Journal Title
  
  Proceedings of the IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
  
  Volume: 1 Pages: 50-54
- DOI
  10.1109/apccas62602.2024.10809010
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Scalable Fully-Coupled Annealing Processing System Implementing 4096 Spins Using 22nm CMOS LSI2024
- Author(s)
  Megumi Taichi、Endo Akari、Kawahara Takayuki
- Journal Title
  
  IEEE Access
  
  Volume: 12 Pages: 19711-19723
- DOI
  10.1109/access.2024.3360034
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22829
[Journal Article] Examination of Magnetization Switching Behavior by Bi-Directional Read of Spin-Orbit-Torque MRAM2022
- Author(s)
  Kishi Yuwa、Yamada Akihiro、Ke Mengnan、Kawahara Takayuki
- Journal Title
  
  IEEE Transactions on Magnetics
  
  Volume: 58 Issue: 5 Pages: 1-10
- DOI
  10.1109/tmag.2022.3154025
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K04536
[Journal Article] Scalable fully coupled annealing processing system and multi-chip FPGA implementation2022
- Author(s)
  Yamamoto Kaoru, Kawahara Takayuki
- Journal Title
  
  Microprocessors and Microsystems
  
  Volume: 95 Pages: 104674-104674
- DOI
  10.1016/j.micpro.2022.104674
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Fabrication and Evaluation of a 22nm 512 Spin Fully Coupled Annealing Processor for a 4k Spin Scalable Fully Coupled Annealing Processing System2024
- Author(s)
  Akari Endo, Taichi Megumi, and Takayuki Kawahara
- Organizer
  IEEE 22nd World Symposium on Applied Machine Intelligence and Informatics (SAMI 2024)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] 4096 スピンスケーラブル全結合型アニーリングシステムと並列化2024
- Author(s)
  惠太一、遠藤あかり、河原尊之
- Organizer
  2024年電子情報通信学会総合大会
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Proposal and Validation of a Dual Scalable Annealing Processing System That Simultaneously Scales Capacity and Precision2024
- Author(s)
  Dong Cui, Taichi Megumi, Akari Endo, Takayuki Kawahara
- Organizer
  36th IEEE International Conference on Microelectronics (ICM 2024)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Efficient Implementation of Parallel Annealing Method with Heisenberg Model2024
- Author(s)
  Kazuma Kanai, Takayuki Kawahara
- Organizer
  2024 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Proposal and Validation of Annealing-processor-calculation Method Using Error-diffusion Rounded Interaction Matrix2024
- Author(s)
  Dong Cui, Takayuki Kawahara
- Organizer
  2024 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] 誤差拡散法による低ビット相互作用イジングマシンの解効率の改善2024
- Author(s)
  崔棟、河原尊之
- Organizer
  2024年電子情報通信学会総合大会
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] スケーラブルイジングマシン向け22nm CMOS LSIチップ設計と評価2024
- Author(s)
  遠藤あかり、惠太一、河原尊之
- Organizer
  2024年電子情報通信学会総合大会
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Examination of Magnetization Switching Behavior by Bi-directional Read of Spin Orbit Torque MRAM2022
- Author(s)
  Akihiro Yamada, Yuwa Kishi, Mengnan Ke, Takayuki Kawahara
- Organizer
  IEEE/AIP 2022 Joint MMM-Intermag Conference (2022 Joint)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Magnetization Switching Behavior in Bi-directional Read of Spin Orbit Torque MRAM2022
- Author(s)
  Akihiro Yamada, Yuwa Kishi, Mengnan Ke, Takayuki Kawahara
- Organizer
  応用物理学会春季学術講演会
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Bi-directional read method to reduce SOT-specific read disturbance for highly reliable SOT-MRAM2022
- Author(s)
  Akihiro Yamada, Yuwa Kishi, Takayuki Kawahara
- Organizer
  14th IEEE International Memory Workshop　(IMW 2022)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Evaluation of Device Size and Array Resistance Dependence in Read Disturbance Reduction Effect by Bi-directional Read SOT-MRAM2022
- Author(s)
  Yuwa Kishi, Akihiro Yamada, Mengnan Ke, Takayuki Kawahara
- Organizer
  応用物理学会春季学術講演会
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Method of Halved Interaction Elements with Regularity Arrangement that achieves Independent Double Systems for Scalable Fully Coupled Annealing Processing2022
- Author(s)
  Shinjiro Kitahara, Akari Endo, Taichi Megumi, and Takayuki Kawahara
- Organizer
  IEEE Asian Solid-State Circuits Conference (A-SSCC 2022)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] スケーラブル型全結合イジングマシン内部の相互作用半減による独立した2つのイジングマシンの実装2022
- Author(s)
  北原伸次朗、遠藤あかり、惠太一、河原尊之
- Organizer
  電子情報通信学会研究会 "デザインガイア2022 -VLSI設計の新しい大地-"
- Data Source
  KAKENHI-PROJECT-23K22829
[Presentation] Evaluation of Read Disturbance Reduction Effect by SOT-MRAM Bi-directional Read on Device Size Dependence2021
- Author(s)
  Yuwa Kishi, Akihiro Yamada, Mengnan Ke, and Takayuki Kawahara
- Organizer
  IEEE International Magnetics Conference 2021 (Intermag 2021)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Evaluation of Read Disturbance Reduction Effect by Bi-directional Read on Ferromagnetic Material Properties of SOT-MRAM2020
- Author(s)
  Yuwa Kishi, Keisuke Tabata, Mengnan Ke, and Takayuki Kawahara
- Organizer
  IEEE/AIP 2020 Magnetism and Magnetic Materials Conference (MMM2020)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04536
[Presentation] Annealing Processing and Emerging Non-volatile Memory for AI Chips2020
- Author(s)
  Takayuki Kawahara
- Organizer
  33rd IEEE International System-on-Chip Conference (SOCC 2020)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04536

Kawahara Takayuki 河原 尊之

Research Projects

Research Products

Development of elementary technologies for simultaneous update and higher precision of fully coupled Ising LSI systemsPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Research on the creation and evaluation of high-performance scalable fully coupled Ising machine LSIPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Study on new read-disturbance mechanism and its solution in Spin-Orbit Torque RAMPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Book] 人工知能チップ回路入門2024

Author(s)

Total Pages

Publisher

Data Source

[Journal Article] Dual Scalable Annealing Processing System That Scales Number of Spins and Interaction Bit Width Simultaneously2025

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Efficient Implementation of Parallel Annealing Method with Heisenberg Model2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Implementation and Evaluation of Two Independent Ising Machines on Same FPGA Board by Reducing Number of Interactions Inside Ising Machine2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Proposal and Validation of a Dual Scalable Annealing Processing System That Simultaneously Scales Capacity and Precision2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Proposal and Validation of Annealing-processor-calculation Method Using Error-diffusion Rounded Interaction Matrix2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Scalable Fully-Coupled Annealing Processing System Implementing 4096 Spins Using 22nm CMOS LSI2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Examination of Magnetization Switching Behavior by Bi-Directional Read of Spin-Orbit-Torque MRAM2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Scalable fully coupled annealing processing system and multi-chip FPGA implementation2022

Author(s)

Journal Title

DOI

Data Source

[Presentation] Fabrication and Evaluation of a 22nm 512 Spin Fully Coupled Annealing Processor for a 4k Spin Scalable Fully Coupled Annealing Processing System2024

Author(s)

Organizer

Data Source

[Presentation] 4096 スピンスケーラブル全結合型アニーリングシステムと並列化2024

Author(s)

Organizer

Data Source

[Presentation] Proposal and Validation of a Dual Scalable Annealing Processing System That Simultaneously Scales Capacity and Precision2024

Author(s)

Organizer

Data Source

[Presentation] Efficient Implementation of Parallel Annealing Method with Heisenberg Model2024

Author(s)

Kawahara Takayuki 河原尊之

[Presentation] 誤差拡散法による低ビット相互作用イジングマシンの解効率の改善2024