Data Sources and Ranking Criteria
The 5th edition of the Research.com Best Rising Stars of Science in Japan Ranking is grounded in comprehensive bibliometric data primarily sourced from OpenAlex and CrossRef, supplemented by multiple other reputable data sources. To ensure a focus on emerging researchers, only scientists whose earliest publication dates back 12 years or less were eligible for consideration. The citation-based metrics underpinning the ranking were derived from bibliometric data collected on January 12, 2026. A researcher’s position in the ranking is determined primarily by their H-index, a robust indicator of both productivity and citation impact within the scientific community.
Scope of Research
The ranking evaluation encompassed an extensive set of 279,971 scientist profiles, aggregated from a diverse range of bibliometric data sources, spanning all major scientific disciplines. Each scientific area utilized tailored qualifying H-index thresholds — generally set at 30 or 40 — to account for disciplinary differences in citation practices and research output norms. In addition to bibliometric performance, scientists’ awards and significant achievements within their respective fields were carefully considered. Ultimately, the ranking features only the top 1,000 scientists who exhibit the highest H-index scores, thereby highlighting truly exceptional rising stars across the scientific landscape.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot provide a definitive evaluation of scholarly contributions, the Research.com team followed meticulous verification protocols. Each scientist’s profile was manually reviewed and cross-referenced against publications indexed in a wide range of trustworthy sources to ensure accuracy and reliability. Although the total number of publications in prestigious journals and conference proceedings does not influence a researcher’s ranking position, it serves as a valuable secondary signal of their contribution to advancing science in their specific area of expertise.
The ranking position is firmly grounded in each researcher’s H-index — as assessed through data from OpenAlex and CrossRef — which represent two of the most prominent and widely recognized bibliometric databases accessible to the global research community. We encourage readers seeking deeper insights into the methodology underlying this ranking to consult our methodology page.
Research.com’s Commitment and Vision
At Research.com, we are deeply convinced that every researcher, regardless of academic tenure, deserves equitable recognition for their scientific accomplishments. This ranking aims to celebrate the achievements of early-career scholars, illuminating their promising contributions to science. By showcasing these rising stars, we aspire to inspire fellow researchers, prospective academics, and decision-makers worldwide. Our ultimate goal is to foster greater inclusivity, provide enhanced opportunities, and promote equal chances for success within the vibrant global scientific community.
