Journal Papers

• • Hikaru KAMIOKA, Satoshi MAEDA, Masayuki HASHIMOTO, "Response Delay Reduction in Large Language Model-Based Dialogue Systems", Journal of Machine Intelligence and Data Science, Volume 5, Pages 152-159, 2024.

  • Tomoaki MIMOTO, Hiroyuki YOKOYAMA, Toru NAKAMURA, Takamasa ISOHARA, Masayuki HASHIMOTO, Ryosuke KOJIMA, Aki HASEGAWA, Yasushi OKUNO, "Privacy-Preserving Correlation Coefficient", IEICE Transactions on Information and Systems, Volume E106.D, Issue 5, Pages 868-876, May 2023.

  • 松井勇太, 白石善明, 小津喬, 橋本真幸, 毛利公美, 葛野弘樹, 森井昌克, "グラフ埋め込みによるEthereumの不正取引アカウント検知",  情報処理学会論文誌,63(12),1770-1775 (2022-12-15) , 1882-7764.

  • Perera, M.N.S.; Nakamura,T.; Hashimoto, M.; Yokoyama, H.;Cheng, C.-M.; Sakurai, K. CertificateManagement Scheme for VANETs Using Blockchain Structure. Cryptography 2022, 6(2), 20; https://doi.org/10.3390/cryptography6020020

  • Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, Hiroyuki Yokoyama, Chen-Mou Cheng, and Kouichi Sakurai, "A Survey on Group Signatures and Ring Signatures: Traceability vs. Anonymity" Cryptography 2022. 6, no. 1: 3,  https://doi.org/10.3390/cryptography6010003

  • Tomoaki Mimoto, Masayuki Hashimoto, Shinsaku Kiyomoto, Koji Kitamura and Atsuko Miyaji,"Privacy Risk of Document Data and a Countermeasure Framework", Journal of Information Processing, Volume 29, 778-786, 2021.

  • Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, HiroyukiYokoyama and Kouichi Sakurai, "Almost fully anonymous attribute-based group signatures with verifier-local revocation and member registration from lattice assumptions", Theoretical Computer Science, Volume 891, 131-148, 2021.

  • Shoei Kakei, Yoshiaki Shiraishi, Masami Mohri, Toru Nakamura, Masayuki Hashimoto and Shoichi Saito, "Cross-Certification Towards Distributed Authentication Infrastructure: A Case of Hyperledger Fabric," IEEE Access, Volume:8, 135742-135757, 2020.

  • Panikos Heracleous, Jani Even, Fumiaki Sugaya, Masayuki Hashimoto and Akio Yoneyama, "Exploiting alternative acoustic sensors for improved noise robustness in speech communication," Pattern Recognition Letters 112: 191-197, 2018.

  • 三島浩路, 黒川雅幸, 大西彩子, 吉武久美, 本庄勝, 橋本真幸, 吉田敏和, "生徒指導上の問題発生頻度および携帯電話に対する規制と高校生の携帯電話依存傾向の関連－高校教師・高校生を対象にした調査結果から", 教育心理学研究   Vol.64 No.4, pp.518 - 530, 2016年12月

  • Masayuki HASHIMOTO, "Mobile Medical Viewer System on Smart Phones for Emergency Medical Service," IEICE Transactions  on Communications Vol. J97–B No. 8, 611–621, 2014 (in Japanese).

  • 内田祐介, 橋本真幸, 川田亮一, "BoF を利用した映像検索における索引規模削減手法," 電子情報通信学会論文誌 D 94 (1), 416-420, 2011.

  • 内田祐介, 橋本真幸, 米山暁夫, 川田亮一, "輝度重心に基づくバイナリー特徴量の適応的照合による高速・高精度な同一映像検出," 電子情報通信学会論文誌 D 93 (9), 1714-1716, 2010. 

  • 松尾 賢治, 橋本真幸, 小池 淳, "類似顔検索のための異なる人物間の顔類似度算出," 電子情報通信学会論文誌 D 92(8), 1383-1392, 2009.

  • 松尾 賢治, 奥村 文教, 橋本真幸, 小池 淳, 久保田 彰, 羽鳥 好律, "腕の振りに基づく生体認証とテンプレート更新による経時変化の抑制," 電子情報通信学会論文誌 B 91(6), 695-705, 2008. 

  • Masayuki Hashimoto, Kenji Matsuo and Atsushi Koike, "JPEG 2000 Encoding Method for Reducing Tiling Artifacts," IEICE Trans. Inf. & Syst., Vol.E88-D No.12, 2839-2848, Dec. 2005. 

  • Masayuki Hashimoto, Kenji Matsuo, Atsushi Koike and Yasuyuki Nakajima, "Tile Size Conversion Algorithm for Tiled Wavelet Image,"  IEICE Trans. Fundamentals, Vol.E87-A No.8, 1901-1912. Aug. 2004.

  • 松尾賢治, 橋本真幸, 小池淳, "ブロック歪の影響を考慮したJPEG 2000 によるJPEG 画像の再符号化方法," 電子情報通信学会論文誌D–II, Vol.J87–D–II, No.8, 1740- 1744, 2004年8月.

  • 橋本真幸, 小池 淳, 松本修一, 山本英雄, "Haarウェーブレット変換とGolomb-Rice符号を用いた遠隔医療のための医用画像階層符号化伝送方式 ," 電子情報通信学会論文誌, Vol.J83-D2 No.1, 303-310, 2000年1月.

Conferences

• • Masayuki Hashimoto, Rikuto Fukushima, “Shared-Experience-Focused Utterance Generation in Dialogue Systems Using Prompt-Based LLM,” 11th World Congress on Electrical Engineering and Computer System and Science (EECSS 2025), MHCI 109, (August 17-19, 2025) (Paris, France)

  • Fuya Oshima, Tubasa Funasaki, Masayuki Hashimoto, “Performance Evaluation of Lightweight Face Detection Models on Low-Resolution Images,” 11th World Congress on Electrical Engineering and Computer System and Science (EECSS 2025), MVML 114, (August 17-19, 2025) (Paris, France)

  • Masayuki Hashimoto, "Reducing Response Delays in Dialogue Systems Using the Predictive Performance of Large Language Models", 10th World Congress on Electrical Engineering and Computer System and Science (EECSS 2024), Barcelona, Spain, August 19-21, 2024.  【Best Paper Award】

  • Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto, Hiroyuki Yokoyama, Chen-Mou Cheng and Kouichi Sakurai, "Decentralized and Collaborative Tracing for Group Signatures", The 17th ACM ASIA Conference on Computer and Communications Security (ACM ASIACCS 2022), Nagasaki, Japan, May. 2022. 【Best Poster Award】

  • Tomoaki Mimoto, Masayuki Hashimoto, Hiroyuki Yokoyama, Toru Nakamura, Takamasa Isohara, Ryosuke Kojima, Aki Hasegawa, and Yasushi Okuno, "Differential privacy under incalculable sensitivity", IEEE 6th International Conference on Cryptography, Security and Privacy (CSP 2022), Tianjin, China, January 14-16, 2022.

  • Yuto Nakano, Toru Nakamura, Yasuaki Kobayashi, Takashi Ozu, Masahito Ishizaka, Masayuki Hashimoto, Hiroyuki Yokoyama, Yutaka Miyake and Shinsaku Kiyomoto, "Automatic Security Inspection Framework for Trustworthy Supply Chain", 18th IEEE/ACIS International Virtual Conference on Software Engineering, Management and Applications (SERA 2021), Kanazawa, Japan, June 20-22, 2021.

  •  Nakano, Yuto, Toru Nakamura, Yasuaki Kobayashi, Masahito Ishizaka, Masayuki Hashimoto, Hiroyuki Yokoyama, Yutaka Miyake, and Shinsaku Kiyomoto. "Consideration on Data Conformance Toward Building Trust in Supply Chain." In 2020 European Conference on Networks and Communications (EuCNC), pp. 128-132. Dubrovnik, Croatia, June 15-18, 2020.

  • Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto and Hiroyuki Yokoyama, "Traceable and fully anonymous attribute based group signature scheme with verifier local revocation from lattices," 13th International Conference, Network and System Security(NSS 2019), Sapporo, Japan, December 15-18, 2019.

  • Maharage Nisansala Sevwandi Perera, Toru Nakamura, Masayuki Hashimoto and Hiroyuki Yokoyama, "Zero-knowledge proof system for fully anonymous attribute based group signatures from lattices with VLR," in the 20th World Conference on Information Security Applications (WISA 2019), Jeju Island, Korea on August 21-24, 2019.

  • Shohei KAKEI, Yoshiaki SHIRAISHI, Masami MOHRI, Toru NAKAMURA, Masayuki HASHIMOTO, Hiroyuki YOKOYAMA and Shoichi SAITO, "The Concept of Meta-PKI: A Decentralized Trust Model Using Smart Contract for Internet of Things," 14th Asia Joint Conference on Information Security (AsiaJCIS 2019), Kobe, Japan, August, 2019.

  • Panikos Heracleous, Keiji Yasuda, Fumiaki Sugaya, Masayuki Hashimoto and Akio Yoneyama, "Speech emotion recognition in noisy and reverberant environments," International Conference on Affective Computing and Intelligent Interaction (ACII2017), San Antonio, Texas, October, 2017.

  • Keiji Yasuda, Panikos Heracleous, Akio Ishikawa, Masayuki Hashimoto, Kazunori Matsumoto and Fumiaki Sugaya, "Building a Location Dependent Dictionary for Speech Translation Systems," 18th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing 2017), Budapest, Hungary, April, 2017.

  • Panikos Heracleous, Akio Ishikawa, Keiji Yasuda, Hiroyuki Kawashima, Fumiaki Sugaya and Masayuki Hashimoto, "Machine Learning Approaches for Speech Emotion Recognition: Classic and Novel Advances," 18th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing 2017), Budapest, Hungary, April, 2017.

  • Masatoshi Nagata, Kazunori Matsumoto and Masayuki Hashimoto, "Prediction for Disease Risk and Medical Cost using Time Series Healthcare Data," International Conference on Health Informatics (HEALTHINF2016), Rome, Italy, Feb. 2016.

  • Do Van Nguyen, Keisuke Ogawa, Kazunori Matsumoto and Masayuki Hashimoto, "Edit Training Sets from Imbalanced Data Using Fuzzy-Rough Sets," IFIP Advances in Information and Communication Technology, Volume 458 Artificial Intelligence Applications and Innovations, 115-129, Springer, 2015. 【Best Paper Award】

  • Masayuki Hashimoto, Umi Nakamura, Miki Akiyama, Toru Takebayashi, Marino Oshima, Tomoki Kumegawa, Hitomi Imachi and Koji Murao, "Meal-Camera System to Support Nutritional Tele-Consultation for Diabetics", American Medical Informatics Association Annual Symposium (AMIA 2015), San Francisco, USA, November 2015.

  • Akiko Shibuya, Keisuke Ogawa, Kazunori Matsumoto, Masayuki Hashimoto, Yukihiro Maeda and Yoshiaki Kondo, "Implementation of a Mobile Electronic Medical Record System that Uses a Problem-oriented Contiguous Timeline View," American Medical Informatics Association Annual Symposium (AMIA 2015), San Francisco, USA, November 2015. 

  • Keisuke Ogawa, Kazunori Matsumoto, Masayuki Hashimoto, and Ryoichi Nagatomi, "Method of screening the health of persons with high risk for potential lifestyle-related diseases using LDA," International Conference on Health Informatics (HEALTHINF 2015), Lisbon,  Jan. 2015.

  • Keisuke Ogawa, Kazunori Matsumoto, Masayuki Hashimoto, Akiko Shibuya and Yoshiaki Kondo, "Clarifying requirements chronological visualization of medical data by investigating medical journal articles," American Medical Informatics Association Annual Symposium (AMIA 2014), Washington, DC, USA, November 2014.

  • Akiyama, M., Takebayashi, T, Kikuchi Rech, Y., Akaike, M., Hashimoto and M., Miura, J., "Development and implementation of a smartphone-based good diet and walking promotion program," 140th APHA Annual Meeting and Exposition 2012, San Francisco, October, 2012.

  • Keisuke Ogawa, Kazunori Matsumoto, Masayuki Hashimoto, Tatsuaki Hamai, Akiko Shibuya and Yoshiaki Kondo, "Mobile TimeLine - Mobile Charting System that Provides a Graphical Summary of a Patient's Medical Record," International Conference on Health Informatics (HEALTHINF2012), Algarve, Portugal, Feb. 2012.

  • Keisuke Ogawa, Kazunori Matsumoto, Masayuki Hashimoto, Tatsuaki Hamai and Yoshiaki Kondo, "Mobile Timeline EMR System - Support System for Doctors' Cognition/Analysis," International Conference on Health Informatics (HEALTHINF2011), Rome, Italy, Jan. 2011.

  • Mitsuo Nohara, Nobuhide Kotsuka, Masayuki Hashimoto and Hiroki Horiuchi, "A study on food-log application to a medical-care consult via telecommunications," 16th International Conference on Virtual Systems and Multimedia, Seoul, South Korea, Oct. 2010.

  • Yusuke Uchida, Masayuki Hashimoto and Ryoichi Kawada, "Fast and robust content-based copy detection based on quadrant of luminance centroid and adaptive feature comparison," 17th IEEE international conference on image processing (ICIP), 2010.

  • Hiroshi Yamakami, Hiroyuki Hirokawa, Hiroki Hayashi, Tomoaki Namioka, Hiroshi Yagi, Daiki Mikami, Yoshinori Mitamura, Tetsuo Shimono, Masaaki Kawase, Osamu Sugimoto, Masayuki Hashimoto, Kenichi Ogaki, Atsushi Koike, Hitomi Murakami, Shuichi Matsumoto and Akitoshi Yoshida, "Study of the Platform of a Medical Information System to Promote Telemedicine Services," Medinfo 2007: Proceedings of the 12th World Congress on Health (Medical) Informatics; Building Sustainable Health Systems, Brisbane, Australia, Aug. 2007.

  • Kenji Matsuo, Fuminori Okumura, Masayuki Hashimoto, Shigeyuki Sakazawa and Yoshinori Hatori, "Arm Swing Identification Method with Template Update for Long Term Stability," International conference on Advances in Biometrics,  Seoul, Korea, Aug. 2007.

  • Fuminori Okumura, Akira Kubota, Yoshinori Hatori, Kenji Matsuo, Masayuki Hashimoto and Atsushi Koike, "A study on biometric authentication based on arm sweep action with acceleration sensor," International Symposium on Intelligent Signal Processing and Communications(ISPACS), Tottori, Japan, Dec. 2006.

  • Masayuki Hashimoto, Kenji Matuso, Atsushi Koike, Kazufumi Suzuki and Ryohei Kuwatsuru, “Mobile Viewer System on Cellular Phones with Secure Internet Access”, Radiological Society of North America(RSNA), Chicago, Illinois, Nov. 2005.

  • Kazufumi Suzuki, Ryohei Kuwatsuru, Toshio Hayano, Masayuki Hashimoto, Atsushi Koike and Norio Mitsuhashi, "The realization of mobile teleradiology: Feasibility Study with newly developed mobile phone application", Radiological Society of North America(RSNA), Chicago, Illinois, Nov. 2005.

  • Masayuki HASHIMOTO, Kenji MATSUO and Atsushi KOIKE, "HIERARCHICAL SECRET IMAGE SHARING METHOD USING JPEG 2000 CODESTREAM SYNTAX," European Signal Processing Conference (EUSIPCO), Antalya, Turkey, Sep. 2005.

  • Masayuki HASHIMOTO, Kenji MATSUO, Tsukasa ISEDA and Atsushi KOIKE, "High-speed Mobile Medical Viewer System on Cellular Phones," Radiological Society of North America(RSNA), Chicago, Illinois, Nov. 2004.

  • Masayuki HASHIMOTO, Kenji MATSUO, Atsushi KOIKE, Hiroki HAYASHI and Tetsuo SHIMONO, "CT Image Compression with Level of Interest," IEEE International Conference on Image Processing(ICIP), Singapore, Oct. 2004.

  • Kenji Matsuo, Masayuki Hashimoto and Atsushi Koike, "A face image recognition scheme with strong tolerances to lighting fluctuations", IEEE International Conference on Image Processing(ICIP), Singapore, Oct. 2004.

  • Masayuki HASHIMOTO, Kenji MATSUO, Tsukasa ISEDA and Atsushi KOIKE, "Internet Medical Imaging in Mobile Networks," Radiological Society of North America(RSNA), Chicago, Illinois, Nov. 2003.

  • Masayuki HASHIMOTO, Kenji MATSUO and Atsushi KOIKE, "High Efficiency Loss-less Coding Method with 3-Dimensional Wavelet Transform for Volumetic Data," IEEE  Medical Imaging Conference, Portland, Oregon, Oct. 2003.

  • Masayuki HASHIMOTO, Kenji MATSUO and Atsushi KOIKE, "JPEG2000 Encoder for Reducing Tiling Artifacts and Accelerating the Coding Process," IEEE International Conference on Image Processing (ICIP), Barcelona, Spain, Sep. 2003.

  • Masayuki HASHIMOTO, Kenji MATSUO and Atsushi KOIKE, "JPEG2000 Encoding Method for Reducing Tiling Artifacts," IASTED International Conference on Visualization, Imaging, and Image Processing (VIIP), Benalmadena, Spain, Sep. 2003.

  • Masayuki HASHIMOTO, Kenji MATSUO, Atsushi KOIKE and Yasuyuki NAKAJIMA, "Tile Boundary Artifact Reduction Algorithms for Tile Size Conversion of Wavelet Image," ACM multimedia, Juan les Pins, France, Dec. 2002.

  • Masayuki HASHIMOTO, Kenji MATSUO, Atsushi KOIKE and Yasuyuki NAKAJIMA, "Hierarchical structure for data transmission of volumetric medical images using three-dimensional wavelet transform," IEEE Nuclear Science Symposium and Medical Imaging Conference, San Diego, CA, Nov. 2001.

  • Masayuki HASHIMOTO, Atsushi KOIKE and Shuichi MATSUMOTO, "Hierarchical Image Transmission System for Telemedicine Using Segmented Wavelet Transform and Golomb-Rice Codes," Global Telecommunications Conference (Globecom), Rio de Janeiro, Brazil, Dec. 1999.

  • Masayuki HASHIMOTO, Atsushi KOIKE and Shuichi MATSUMOTO, "Hierarchical Still Image Coding Using Modified Golomb-Rice code for medical image information system," International Workshop on Advanced Image Technology (IWAIT), Shinchu, Taiwan, Jan. 1999.

Forum presentation

• • Masayuki HASHIMOTO, "Internet Telemedicine in Mobile Networks," ITU Telecom World 2003 FORUM, Oct. 2003. 

Articles

• • 橋本真幸, "緊急時モバイル医用画像伝送表示システム ～PocketMIMAS／MobileMIMAS～," 映像情報インダストリアル, 2005年8月号.

  • 橋本真幸, "モバイル医用画像伝送システムとASP," 医療とコンピュータ, 2002年10月号.

  • 橋本真幸, "PDAによる画像配信システム ～PocketMIMASの開発～," Digital Medicine, 2002年7･8月号.

US Patents

• • Image transmission system, viewing system for received images, and image transmission viewing system with TV conference function, M Hashimoto, A Koike and S Matsumoto, US Patent App. 09/785,305, (Abandoned).

  • Encoder for volume data, M Hashimoto, K Matsuo, A Koike and Y Nakajima, US Patent 7,254,267, (Expired).