Basic Information

Faculty

• Faculty of Engineering

Email Address

• Email Address

  matsunaga.wataru.5wkyoto-u.ac.jp

Professional Memberships

• From May 2024, To Present

  The Society of Materials Science, Japan
• From Jun. 2023, To Present

  The Japan Society of Mechanical Engineers
• From Jun. 2022, To Present

  日本複合材料学会
• From Sep. 2019, To Present

  日本非破壊検査協会

Academic Degree

• 26 Mar. 2018

  東京工業大学修士（工学）
• 22 Sep. 2022

  東京工業大学博士（工学）

Academic Resume (Undergraduate School/Majors)

• 東京工業大学, 工学部機械宇宙学科, 卒業
• 東京工業大学, 第７類生命理工学部

Research History

• From Oct. 2022, To Present

  Kyoto University, Graduate School of Engineering Department of Mechanical Engineering and Science, Assistant Professor
• From Apr. 2020, To Sep. 2022

  Japan Society for the Promotion of Science Research Fellowship for Young Scientists

ID,URL

• ORCID ID

  0000-0001-7800-5571

• J-Global ID

  202201008794780805

• Researcher number

  70975424

researchmap URL

• https://researchmap.jp/wmatsunaga-51

Research

Research Areas

• Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Machine materials and mechanics

Papers

• Insensitive effect of crack length in non-electrically conductive materials on the displacement current field in electromagnetic induction testing

  Wataru Matsunaga; Yoshihiro Mizutani

  NDT & E International, Dec. 2025, Peer-reviewed, Lead author, Corresponding author

  
• Enhanced piezoelectric response in two-dimensional layered ferroelectric α-In₂Se₃ via indentation-induced shear strain

  Yang Zhang; Seita Katayama; Yinli Wang; Wataru Matsunaga; Masaya Kono; Takahiro Shimada; Hiroyuki Hirakata

  Journal of Physics D: Applied Physics, 20 May 2025, Peer-reviewed

  
• Effect of a Crack on the Displacement Current Field of Non–electrically Conductive Materials via Electromagnetic Induction Testing

  Wataru Matsunaga; Yohishiro Mizutani

  Journal of Nondestructive Evaluation, Feb. 2025, Peer-reviewed, Lead author, Corresponding author

  
• Identification of crack orientation in electrically conductive materials using eddy current testing powered by rotational directive filter

  Wataru Matsunaga; Xiaojuan Xu; Koichi Mizukami; Yoshihiro Mizutani; Akira Todoroki

  NDT & E International, Mar. 2025, Peer-reviewed, Lead author, Last author

  
• Evaluating the moisture absorption percentage in the adhesive layers of carbon fiber reinforced plastic joints via electromagnetic induction testing and diffusion analysis

  Wataru MATSUNAGA; Satoshi IMAI; Yoshihiro MIZUTANI; Tetsuo YASUOKA; Akira TODOROKI

  International Journal of Adhesion and Adhesives, Jan. 2025, Peer-reviewed, Lead author, Corresponding author

  
• Nano-thick surface-modified layer governs bending deformation of micrographite

  Wataru Matsunaga; Kiyohiko Kajiyama; Hiroyuki Hirakata

  Carbon, Jan. 2025, Peer-reviewed, Lead author

  
• Alterable fracture toughness of amorphous silica by injection and removal of electrostatic charge

  Wataru Matsunaga; Seiya Shichino; Takumi Takahashi; Takahiro Shimada; Hiroyuki Hirakata

  Scripta Materialia, Jan. 2025, Peer-reviewed, Lead author

  
• Measurement of through-thickness electrical properties of carbon fiber reinforced thermoplastics using transmission method based on electromagnetic induction testing

  Wataru Matsunaga; Satoshi Imai; Yoshihiro Mizutani; Akira Todoroki

  NDT & E International, Oct. 2024, Peer-reviewed, Lead author, Corresponding author

  
• Evaluation Method for Electromagnetic Induction Testing of Dielectrics Using Impedance Plane Diagrams Drawn Using Ampère-Maxwell Equation and Simple Electrical Circuit Model

  Wataru Matsunaga; Yoshihiro Mizutani

  Journal of Nondestructive Evaluation, 26 Feb. 2024, Peer-reviewed, Lead author, Corresponding author

  Access this paper :

  
• Effects of fiber orientation and resin-rich layers in carbon fiber reinforced thermoplastics on electromagnetic induction testing

  Wataru Matsunaga; Satoshi Imai; Yoshihiro Mizutani; Akira Todoroki

  Advanced Composite Materials, 12 Dec. 2023, Peer-reviewed, Lead author, Corresponding author

  
• Estimation of the moisture absorption rate of carbon fiber reinforced plastic using electromagnetic induction testing

  Wataru Matsunaga; Satoshi Imai; Yoshihiro Mizutani; Tetsuo Yasuoka; Akira Todoroki

  Composites Part A: Applied Science and Manufacturing, Nov. 2023, Peer-reviewed, Lead author, Corresponding author

  
• Qualitative evaluation of the moisture absorption rate in adhesive layers of carbon fiber reinforced plastic joints using electromagnetic induction testing

  Wataru Matsunaga; Satoshi Imai; Yoshihiro Mizutani; Tetsuo Yasuoka; Akira Todoroki

  Composite Structures, Nov. 2023, Peer-reviewed, Lead author, Corresponding author

  
• Estimation of the moisture absorption rate of glass fiber reinforced plastic using electromagnetic induction testing

  Wataru Matsunaga; Koichi Mizukami; Yoshihiro Mizutani; Akira Todoroki

  Composites Part C: Open Access, Aug. 2022, Peer-reviewed, Lead author, Corresponding author

  
• In-process inspection method for short-fiber CFRTP filament for 3D-printing

  今井理; 松永航; 水谷義弘; 轟章

  強化プラスチックス, 2022, Peer-reviewed

  
• Examination of the measurement condition and specification of the rectangular planar spiral coil for electromagnetic induction testing applied to the non-electrically conductive material sandwiched by CFRPs

  松永航; 水谷義弘; 轟章

  強化プラスチックス, 2022, Peer-reviewed, Lead author

  
• Applicability of eddy current testing in CFRP using electrodes on CFRP surface and control of the testing range

  Wataru Matsunaga; Koichi Mizukami; Yoshihiro Mizutani; Akira Todoroki

  Advanced Composite Materials, 2022, Peer-reviewed, Lead author, Corresponding author

  
• Fundamental study on smart eddy current testing for identification of crack orientation by controlling electromagnetic field using electrically anisotropic plate

  Xiaojuan Xu; Wataru Matsunaga; Koichi Mizukami; Yoshihiro Mizutani; Akira Todoroki

  Advanced Composite Materials, 2022, Peer-reviewed

  
• Examination of the arrangement and shape of coils for permittivity measurement of dielectric sandwiched between carbon fiber reinforced plastics using electromagnetic induction testing

  Wataru Matsunaga; Yoshihiro Mizutani

  Advanced Composite Materials, 2022, Peer-reviewed, Lead author, Corresponding author

  
• Permittivity Measurement of Non-electrical-conductive Materials Using the Electromagnetic Induction Testing with the Backplate

  松永航; 松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  強化プラスチックス, 2019, Peer-reviewed, Lead author

  

Presentations

• 余剰電子が支配するアモルファスシリカの破壊じん性の飛躍的向上

  松永航; 高橋拓眞; 前田淳佑; 平方寛之

  第74期通常総会･学術講演会, 31 May 2025

  
• Mechanical Control of Ferroelectric Polarization in Two-Dimensional α-In2Se3

  Yang Zhang; Seita Katayama; Wataru Matsunaga; Hiroyuki Hirakata

  7th International Conference on Materials and Reliability (ICMR-2024), 05 Dec. 2024

  
• Mechanical Evaluation of Localized Interlayer Slip Strength in van der Waals-Layered Materials

  Shiyu Oga; Wataru Matsunaga; Hiroyuki Hirakata

  7th International Conference on Materials and Reliability (ICMR-2024), 04 Dec. 2024

  
• Impact of Excess Electrons and Holes on Fracture Toughness of Amorphous Silica

  Wataru Matsunaga; Seiya Shichino; Takumi Takahashi; Hiroyuki Hirakata

  7th International Conference on Materials and Reliability (ICMR-2024), 04 Dec. 2024

  
• Mechanical Control of Electro-Mechanical Response in 2D Materials

  Seita Katayama; Yuto Ioki; Wataru Matsunaga; Hiroyuki Hirakata

  7th International Conference on Materials and Reliability (ICMR-2024), 04 Dec. 2024

  
• Fatigue Properties of highly oriented pyrolytic graphite, a van der Waals-layered material

  Kosuke Shigeto; Wataru Matsunaga; Hiroyuki Hirakata

  14th Asia-Pacific Conference on Fracture and Strength (APCFS 2024), 28 Nov. 2024

  
• Injection of excess electrons/holes enhances the fracture toughness of amorphous silica

  Takumi Takahashi; Wataru Matsunaga; Hiroyuki Hirakata

  14th Asia-Pacific Conference on Fracture and Strength (APCFS 2024), 28 Nov. 2024

  
• 二次元材料における電気-機械応答特性

  片山晴太; 井置裕翔; 松永 航; 平方寛之

  第10回材料WEEK 材料シンポジウム 若手学生研究発表会, 08 Oct. 2024

  
• 高配向性熱分解グラファイトの曲げ疲労特性

  上垣慎; 重藤鴻介; 松永航; 平方寛之

  第10回材料WEEK 材料シンポジウム ワークショップ, 08 Oct. 2024

  
• 余剰電子／ホールの注入・除去によるアモルファスシリカの破壊じん性変化の恒久性と可逆性

  松永航; 七野誠哉; 高橋拓眞; 平方寛之

  第10回材料WEEK 材料シンポジウム ワークショップ, 08 Oct. 2024

  
• 余剰電子/ホールによる合成石英の破壊じん性向上

  高橋拓眞; 松永航; 平方寛之

  日本機械学会 2024年度 年次大会, 10 Sep. 2024

  
• ファンデルワールス積層材料グラファイトの曲げ疲労特性

  重藤鴻介; 上垣慎; 松永航; 平方寛之

  日本機械学会 2024年度 年次大会, 09 Sep. 2024

  
• ナノ表面層が支配するマイクログラファイトの曲げ変形特性

  松永航; 梶山斉彦; 平方寛之

  日本機械学会 2024年度 年次大会, 09 Sep. 2024

  
• Effects of excess electrons/holes on fracture toughness of amorphous silica

  Wataru Matsunaga; Seiya Shichino; Takumi Takahashi; Hiroyuki Hirakata

  Symposium on Mechanics of Advanced Materials & Structures for Young Researchers 2024 (SMAMS 2024), 06 Sep. 2024, Invited

  
• Mechanical switching of ferroelectric polarization in van der Waals-layered α-In2Se3

  Yang Zhang; Seita Katayama; Hidefumi Takahashi; Wataru Matsunaga; Hiroyuki Hirakata

  Symposium on Mechanics of Advanced Materials & Structures for Young Researchers 2024 (SMAMS 2024), 06 Sep. 2024

  
• Electrons and holes alter intrinsic material strength

  Hiroyuki Hirakata; Wataru Matsunaga; Takahiro Shimada

  European Conference on Fracture 2024 (ECF-24), 30 Aug. 2024

  
• Engineering of fracture toughness of amorphous silica by excess electrons and holes

  Wataru Matsunaga; Seiya Shichino; Takumi Takahashi; Hiroyuki Hirakata

  European Conference on Fracture 2024 (ECF-24), 26 Aug. 2024

  
• Evaluation of localized interlayer slip strength in van der Waals-layered materials

  Shiyu Oga, Wataru Matsunaga, Hiroyuki Hirakata

  第73期通常総会, 26 May 2024

  
• CFRPに挟まれた誘電体に対する片面式電磁誘導法を用いた誘電率測定

  沼田恒範; 水谷義弘; 松永航

  2023年度 安全・安心な社会を築く先進材料・非破壊計測技術シンポジウム, 28 Mar. 2024

  
• 余剰電子／ホールによるアモルファスシリカの破壊じん性の書き換え

  松永航; 七野誠哉; 高橋拓眞; 平方寛之

  第180回破壊力学部門委員会, 05 Mar. 2024, Invited

  
• Development of the eddy current testing method for UD-CFRP using the electrode

  Wataru Matsunaga; Koichi Mizukami; Yoshihiro Mizutani; Akira Todoroki

  The Seventh Joint-Symposium on Mechanics of Advanced Materials & Structures (JSMAMS 2023), 03 Dec. 2023

  
• Mechanical control of electro-mechanical properties in two-dimensional materials

  Yang Zhang; Seita Katayama; Hidefumi Takahashi; Wataru Matsunaga; Hiroyuki Hirakata

  The Seventh Joint-Symposium on Mechanics of Advanced Materials & Structures (JSMAMS 2023), 02 Dec. 2023

  
• Mechanical control of electro-mechanical response in two-dimensional materials

  Yang Zhang; Seita Katayama; Hidefumi Takahashi; Wataru Matsunaga; Hiroyuki Hirakata

  ATEM – iDICs’23, 12 Oct. 2023

  
• Effects of excess electrons/holes on elastic properties of van der Waals stacked materials

  Atsuki Kiyonaga; Wataru Matsunaga; Hiroyuki Hirakata

  ATEM – iDICs’23, 11 Oct. 2023

  
• Rewritable high fracture toughness of silica glass by injection and removal of electrostatic charge

  Wataru Matsunaga; Seiya Shichino; Hiroyuki Hirakata

  ATEM – iDICs’23, 10 Oct. 2023

  
• Engineering of the deformation properties of submicron-sized graphite cantilevers by modifying the surface layer

  Kiyohiko Kajiyama; Wataru Matsunaga; Hiroyuki Hirakata

  ATEM – iDICs’23, 10 Oct. 2023

  
• Experimental evaluation of effects of excess electrons/holes on the interface strength between insulator (SiO2) and semiconductor (Si)

  Keigo Kawada; Wataru Matsunaga; Hiroyuki Hirakata

  M&M2023, 28 Sep. 2023

  
• A Method for Evaluating Inverse Flexoelectricity of Multilayer 2D Materials

  Seita Katayama; Hidefumi Takahashi; Wataru Matsunaga; Hiroyuki Hirakata

  M&M2023, 27 Sep. 2023

  
• Engineering of fracture toughness of amorphous silica by injecting and removal of electrostatic charge

  Wataru Matsunaga, Seiya Shichino, Hiroyuki Hirakata

  M&M2023, 27 Sep. 2023

  
• Excess electron/hole doping alters elastic properties of van der Waals stacked materials

  Atsuki KIYONAGA; Wataru MATSUNAGA; Hiroyuki HIRAKATA

  日本機械学会2023年度年次大会, 06 Sep. 2023

  
• Effects of Surface Modified Layer on Bending Deformation of Submicron-sized Graphite Cantilevers

  Kiyohiko KAJIYAMA; Wataru MATSUNAGA; Hiroyuki HIRAKATA

  日本機械学会2023年度年次大会, 06 Sep. 2023

  
• 電磁誘導試験によるGFRPの吸湿率評価手法の開発

  松永航; 水上孝一; 水谷義弘; 轟章

  第47回日本複合材料シンポジウム, Sep. 2022

  
• Fundamental study for construction of the theory for crack detection in dielectric using electromagnetic induction testing

  W. Matsunaga; Y. Mizutani

  7th US-Japan NDT Symposium, Aug. 2022

  
• 電磁誘導試験を用いたCFRP接着継手の吸湿評価

  松永航; 今井理; 水谷義弘; 安岡哲夫

  令和3年度 安全・安心な社会を築く先進材料・非破壊計測技術ミニシンポジウム, Mar. 2022

  
• FUNDAMENTAL STUDY ON ELECTROMAGNETIC INDUCTION TESTING WITH DRIVER FIELD LENS (DFL) TO DETECT CRACKS IN GFRP AND IDENTIFY THE DIRECTIONS

  W. Matsunaga; K. Mizukami; Y. Mizutani; A. Todoroki

  17th Japan International SAMPE Symposium & Exhibition, Tokyo, December 2021, Dec. 2021

  
• 導電経路付与によるCFRPの電磁誘導探傷範囲の制御

  松永航; 水上孝一; 水谷義弘; 轟章

  65th FRP CON-EX2021, Nov. 2021

  
• 炭素繊維強化プラスチックの接着接合部の誘電率変化に対する電磁誘導探傷法の適用可能性の検討

  松永航; 水谷義弘; 安岡哲夫

  令和2年度 安全・安心な社会を築く先進材料・非破壊計測技術ミニシンポジウム, 29 Mar. 2021

  
• 3DプリントCFRP 印刷時におけるフィラメントのその場検査

  今井理; 松永航; 水谷義弘

  令和2年度 安全・安心な社会を築く先進材料・非破壊計測技術ミニシンポジウム, Mar. 2021

  
• Defect Detection in GFRP Plates Using Electromagnetic Induction Testing Using Autoencoder

  W. Matsunaga; Y. Mizutani; A. Todoroki

  1st International Electronic Conference on Applied Sciences, Nov. 2020

  
• Effect of a Backplate Using in Electromagnetic Induction Method for Permittivity Measurement

  W. Matsunaga; K. Mizukami; Y. Mizutani; A. Todoroki; Y. Suzuki

  15th Asia Pacific Conference for Non-Destructive Testing, Nov. 2017

  
• GFRPの誘電率変化検出に対するバックプレートの適用

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  平成29年度秋季講演大会, Oct. 2017

  
• Qualitative Measurement of Moisture Absorption in GFRP Utilizing Electromagnetic Induction

  W. Matsunaga; K. Mizukami; Y. Mizutani; A. Todoroki; Y. Suzuki

  14th International Conference Application of Contemporary Non-Destructive Testing in Engineering, Sep. 2017

  
• バックプレートを組み合わせた電磁誘導非破壊検査によるGFRPの誘電率測定法の開発

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  安心・安全な社会を築く先進材料・非破壊計測シンポジウム, Mar. 2017

  
• 誘電率測定用プローブを用いたGFRPの吸湿率測定

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  61st FRP CON-EX2016, Nov. 2016

  
• Measurement of Moisture Absorption of Both-sides Immersed GFRP Using Nondestructive Testing Method Based on Electromagnetic Induction

  W. Matsunaga; K. Mizukami; Y. Mizutani; A. Todoroki; Y. Suzuki

  The 12th China-Japan Joint Conference on Composite Materials, Sep. 2016

  
• GFRPの誘電率変化検出による吸湿率測定

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  第41回複合材料シンポジウム, Sep. 2016

  
• GFRPの吸湿率測定のための電磁誘導非破壊検査用プローブの開発

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  平成28年度 保守検査部門・新素材に関する非破壊試験部門合同ミニシンポジウム, Jul. 2016

  
• 電磁誘導非破壊検査を用いたGFRPの誘電率測定

  松永航; 水上孝一; 水谷義弘; 轟章; 鈴木良郎

  第7回日本複合材料会議, Mar. 2016

  

External funds: Kakenhi

• 電磁界形態制御に基づく誘電体薄膜の電磁誘導探傷法の開発

  Grant-in-Aid for Early-Career Scientists

  Basic Section 18010:Mechanics of materials and materials-related

  Kyoto University

  松永 航

  From 01 Apr. 2023, To 31 Mar. 2025, Granted

  誘電体薄膜;電磁誘導試験;変位電流;電磁シールド;薄膜;誘電率

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23K13220/
• 静電気によるファンデルワールス材料の変形特性の能動的制御

  Grant-in-Aid for Early-Career Scientists

  Basic Section 18010:Mechanics of materials and materials-related

  Kyoto University

  松永 航

  From 01 Apr. 2025, To 31 Mar. 2027, Adopted

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25K17508/

Education

Teaching subject(s)

• From 01 Apr. 2025, To 31 Mar. 2026

  Mechanical and System Engineering Laboratory 2

  5057, Spring, Faculty of Engineering, 1
• From 01 Apr. 2025, To 31 Mar. 2026

  Mechanical and System Engineering Laboratory 2

  5057, Fall, Faculty of Engineering, 1
• From 01 Apr. 2025, To 31 Mar. 2026

  Exercise for Machine Shop Practice

  5061, Fall, Faculty of Engineering, 1
• From 01 Apr. 2024, To 31 Mar. 2025

  機械製作実習

  Fall, 工学部
• From 01 Apr. 2023, To 31 Mar. 2024

  機械製作実習

  Fall, 工学部
• From 01 Apr. 2024, To 31 Mar. 2025

  Mechanical and System Engineering Laboratory 2

  5057, Fall, Faculty of Engineering, 1
• From 01 Apr. 2024, To 31 Mar. 2025

  Mechanical and System Engineering Laboratory 2

  5057, Spring, Faculty of Engineering, 1
• From 01 Apr. 2023, To 31 Mar. 2024

  Mechanical and System Engineering Laboratory 2

  5057, Fall, Faculty of Engineering, 1
• From 01 Apr. 2023, To 31 Mar. 2024

  Mechanical and System Engineering Laboratory 2

  5057, Spring, Faculty of Engineering, 1