An institution’s position in the ranking is determined by the sum of the D-indexes (Discipline H-index) of all included scholars primarily affiliated with that institution and whose main publication area is Materials Science. Importantly, the D-index is carefully curated to incorporate exclusively publications and citation data directly relevant to the discipline under analysis, ensuring discipline-specific precision in evaluation.
Scope of Research Evaluated
The scope for this edition was expansive and meticulous. A total of 279,971 scientist profiles sourced from a diverse array of bibliometric databases were examined. Out of these, 37,821 scientists whose work is specifically centered in Materials Science were subjected to detailed analysis.
The selection process imposed a qualifying D-index threshold of 40 for scientists, with an additional requirement that the majority of their most distinguished publications be in the area of Materials Science. Moreover, a scientist's awards and notable achievements in Materials Science were also taken into account during evaluation.
To ensure representation of top researchers, the D-index threshold for inclusion was set as an increment of 10, contingent on the total estimated number of scholars per discipline, but always designed to ensure that at least the top 1% of leading scholars are included. Furthermore, a proximity of 30% or less between a scientist’s general H-index and their D-index was required. Once again, scientist’s accolades and career achievements in their field were considered as additional factors in evaluation.
Verification and Validation Practices
Recognizing the limitations inherent in raw bibliometric data, the researchers at Research.com implemented a rigorous manual verification process. Every scientist profile underwent manual validation and was cross-checked against publications listed in established, trustworthy sources. While the number of articles published in high-impact journals and conference proceedings does not directly influence a researcher's position in our ranking, it serves as a valuable additional indicator of an individual’s contribution to advancing scientific knowledge.
The core ranking metric remains the researcher’s H-index, as determined from data in OpenAlex and CrossRef, which together are regarded as the most comprehensive and authoritative bibliometric databases available to the research community. Our team invites readers and stakeholders to delve deeper into our rigorous selection criteria and process by visiting our methodology page.
Research.com’s Mission and Agenda
The motivation behind developing the Best Materials Science Universities in Japan Ranking lies in the mission to inspire scientists, business leaders, and policy makers globally. Research.com endeavours to illuminate the directions in which top experts are advancing and to provide comprehensive, reliable tools that the global research community can use to identify leading specialists within specific disciplines, as well as across countries and research institutions.
Key Results of the Ranking
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Top 3 Institutions in Japan by Leading Scientists in Materials Science:
- Tohoku University – 89 scientists
- Kyoto University – 66 scientists
- Osaka University – 53 scientists
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Global Leaders in Materials Science:
The most prominent scholars in Materials Science are currently affiliated with: Georgia Institute of Technology, École Polytechnique Fédérale de Lausanne, MIT, Harvard University, Stanford University, Drexel University, China University of Geosciences, Rice University, City University of Hong Kong, and Tsinghua University.
- Professor Zhong Lin Wang (Georgia Institute of Technology) – Ranked #1 globally with a D-index of 315
- Michael Grätzel (École Polytechnique Fédérale de Lausanne) – Ranked #2 globally with a D-index of 292
- Robert Langer (MIT) – Ranked #3 globally with a D-index of 288
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Statistical Insights:
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Average total D-index for the top 5% of universities: 3,826
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Average total D-index for all 1,282 institutions ranked: 524
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Average number of published Materials Science articles by scientists at top 5% universities: 17,885
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Average number of published articles for all 1,282 institutions: 2,500
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Average citations for researchers at top 1% universities: 2,279,971
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Average citations for researchers for all 1,282 institutions: 279,971
The meticulous, comprehensive approach of the Research.com ranking ensures its position as a premier resource for academia and industry alike, transforming raw data into actionable insights about the leaders and institutions shaping the future of Materials Science in Japan and around the globe.
