World's Best Scientists 2026 revealed!
Koji Hagihara

Koji Hagihara

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 42 12484 12074 781 744 181 9506

Koji Hagihara publications per year

The chart shows the history of publications by Koji Hagihara between 1998 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Koji Hagihara published across 28 years, from 1998 to 2025, averaging 7.4 papers a year. Output peaked at 21 publications in 2013. 20 of the 206 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1998 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2013. 1998: 2 publications 1999: 1 publication 2000: 1 publication 2001: 3 publications 2002: 3 publications 2003: 4 publications 2004: 4 publications 2005: 4 publications 2006: 7 publications 2007: 3 publications 2008: 3 publications 2009: 5 publications 2010: 12 publications 2011: 4 publications 2012: 7 publications 2013: 21 publications 2014: 10 publications 2015: 8 publications 2016: 14 publications 2017: 10 publications 2018: 12 publications 2019: 8 publications 2020: 7 publications 2021: 13 publications 2022: 8 publications 2023: 12 publications 2024: 10 publications 2025: 10 publications
1998 2025

206 publications in total across all disciplines

View publications per year as a table
Koji Hagihara: publications per year, 1998 to 2025
Year Publications
1998 2
1999 1
2000 1
2001 3
2002 3
2003 4
2004 4
2005 4
2006 7
2007 3
2008 3
2009 5
2010 12
2011 4
2012 7
2013 21
2014 10
2015 8
2016 14
2017 10
2018 12
2019 8
2020 7
2021 13
2022 8
2023 12
2024 10
2025 10
Total 206
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Koji Hagihara publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Koji Hagihara sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 170–189 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 181 publications — 24th percentile

24% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850 181
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Koji Hagihara D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Koji Hagihara sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 42–43 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 42 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450 42
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621
56–57 597
58–59 610
60–61 587
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Koji Hagihara is affiliated with Osaka University in Japan and has an extensive record of research predominantly in engineering and materials science. Their work contributes notably to the study of magnesium alloys and aluminum alloy composites, focusing on their microstructure, properties, and applications.

The main fields of study for Koji Hagihara include:

  • Engineering
  • Materials Science

Their research spans several subfields, such as:

  • Mechanical Engineering
  • Biomaterials
  • Materials Chemistry
  • Aerospace Engineering
  • Mechanics of Materials

Key topics explored in their work cover:

  • Magnesium Alloys: Properties and Applications
  • Aluminum Alloys Composites Properties
  • Aluminum Alloy Microstructure Properties
  • Advanced Welding Techniques Analysis
  • Metal and Thin Film Mechanics
  • Additive Manufacturing Materials and Processes
  • Microstructure and mechanical properties

Koji Hagihara has contributed to multiple frequent publication venues, including:

  • MATERIALS TRANSACTIONS
  • Journal of Magnesium and Alloys
  • Materials Science and Engineering A
  • Acta Materialia
  • International Journal of Plasticity

The researcher has collaborated with several frequent co-authors, such as:

  • Toko Tokunaga
  • Michiaki Yamasaki
  • Takayoshi Nakano
  • Yoshihito Kawamura
  • Tsuyoshi MAYAMA

Recent notable papers authored or co-authored by Koji Hagihara include:

  • "Control of Anisotropic Crystallographic Texture in Powder Bed Fusion Additive Manufacturing of Metals and Ceramics-A Review," 2021, published in JOM
  • "Surprising increase in yield stress of Mg single crystal using long-period stacking ordered nanoplates," 2021, published in Acta Materialia
  • "Ultrahigh specific strength in a magnesium alloy strengthened by spinodal decomposition," 2021, published in Science Advances

Other publications related to their field of research include works involving crystallographic texture stability in additive manufacturing and analysis of deformation mechanisms in magnesium alloys.

Best Publications

  • Effect of long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy

    K. Hagihara;A. Kinoshita;Y. Sugino;M. Yamasaki

  • Effect of multimodal microstructure evolution on mechanical properties of Mg–Zn–Y extruded alloy

    Michiaki Yamasaki;Kenji Hashimoto;Koji Hagihara;Yoshihito Kawamura

  • Plastic deformation behavior of Mg12YZn with 18R long-period stacking ordered structure

    K. Hagihara;N. Yokotani;Y. Umakoshi

  • Crystallographic texture control of beta-type Ti–15Mo–5Zr–3Al alloy by selective laser melting for the development of novel implants with a biocompatible low Young's modulus

    Takuya Ishimoto;Koji Hagihara;Kenta Hisamoto;Shi-Hai Sun

  • Excellent mechanical and corrosion properties of austenitic stainless steel with a unique crystallographic lamellar microstructure via selective laser melting

    Shi Hai Sun;Takuya Ishimoto;Koji Hagihara;Yusuke Tsutsumi

  • Crystallographic classification of kink bands in an extruded Mg–Zn–Y alloy using intragranular misorientation axis analysis

    Michiaki Yamasaki;Koji Hagihara;Shin Ichi Inoue;Jason Paul Hadorn

  • Effect of scanning strategy on texture formation in Ni-25 at.%Mo alloys fabricated by selective laser melting

    Shi Hai Sun;Koji Hagihara;Takayoshi Nakano

  • Ultrahigh specific strength in a magnesium alloy strengthened by spinodal decomposition

    Tongzheng Xin;Yuhong Zhao;Yuhong Zhao;Reza Mahjoub;Jiaxi Jiang

  • Peculiar elastic behavior of Ti–Nb–Ta–Zr single crystals

    M. Tane;S. Akita;T. Nakano;K. Hagihara

  • Effect of building direction on the microstructure and tensile properties of Ti-48Al-2Cr-2Nb alloy additively manufactured by electron beam melting

    Mitsuharu Todai;Takayoshi Nakano;Tianqi Liu;Hiroyuki Y. Yasuda

  • Strengthening mechanisms acting in extruded Mg-based long-period stacking ordered (LPSO)-phase alloys

    Koji Hagihara;Zixuan Li;Michiaki Yamasaki;Yoshihito Kawamura

  • Plastic deformation behavior of Mg89Zn4Y7 extruded alloy composed of long-period stacking ordered phase

    K. Hagihara;A. Kinoshita;Y. Sugino;M. Yamasaki

  • Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions

    Koji Hagihara;Masayoshi Okubo;Michiaki Yamasaki;Michiaki Yamasaki;Takayoshi Nakano

  • High-temperature compressive deformation behavior of Mg97Zn1Y2 extruded alloy containing a long-period stacking ordered (LPSO) phase

    K. Hagihara;A. Kinoshita;Y. Fukusumi;M. Yamasaki

  • Elastic properties of an Mg-Zn-Y alloy single crystal with a long-period stacking-ordered structure

    M. Tane;Y. Nagai;H. Kimizuka;K. Hagihara

  • Plastic deformation behavior of 10H-type synchronized LPSO phase in a Mg–Zn–Y system

    Koji Hagihara;Takuya Okamoto;Hitoshi Izuno;Michiaki Yamasaki

  • Highly ordered 10H-type long-period stacking order phase in a Mg-Zn-Y ternary alloy

    Michiaki Yamasaki;Masafumi Matsushita;Koji Hagihara;Hitoshi Izuno

  • Plastic Deformation Behavior of Mg12ZnY LPSO-Phase with 14H-Typed Structure

    K. Hagihara;Y. Sugino;Y. Fukusumi;Y. Umakoshi

  • Biocompatible low Young's modulus achieved by strong crystallographic elastic anisotropy in Ti–15Mo–5Zr–3Al alloy single crystal

    S.-H. Lee;M. Todai;M. Tane;K. Hagihara

  • Configuration of dislocations in low-angle kink boundaries formed in a single crystalline long-period stacking ordered Mg-Zn-Y alloy

    Tsubasa Matsumoto;Michiaki Yamasaki;Koji Hagihara;Yoshihito Kawamura

  • Effect of Extrusion Parameters on Mechanical Properties of Mg97Zn1Y2 Alloys at Room and Elevated Temperatures

    Masaaki Hirano;Michiaki Yamasaki;Koji Hagihara;Kenji Higashida

Frequent Co-Authors

Takayoshi Nakano
Takayoshi Nakano Osaka University
Yukichi Umakoshi
Yukichi Umakoshi Osaka University
Michiaki Yamasaki
Michiaki Yamasaki Kumamoto University
Yoshihito Kawamura
Yoshihito Kawamura Kumamoto University
Haruyuki Inui
Haruyuki Inui Kyoto University
Yuichiro Koizumi
Yuichiro Koizumi Osaka University
Akihiko Chiba
Akihiko Chiba Tohoku University
Hideo Nakajima
Hideo Nakajima Osaka University
Mitsuo Niinomi
Mitsuo Niinomi Tohoku University
Shinji Kohara
Shinji Kohara National Institute for Materials Science

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