Data Sources and Citation Metrics
The 5th edition of the Research.com Best Business and Management Scientists in Japan Ranking is primarily derived from bibliometric data sourced from OpenAlex and CrossRef, complemented by a variety of additional reputable data sources. These extensive datasets provide a comprehensive foundation for evaluating scholarly output and citation impact. The bibliometric data used to devise the citation-based metrics for this ranking were collected on January 12, 2026. Each scientist’s position within the ranking is determined by their D-index (Discipline H-index), a metric that evaluates a researcher’s productivity and citation impact strictly within the confines of the examined discipline, ensuring a discipline-specific assessment of scholarly contributions.
Scope of Research and Qualification Criteria
Our analysis encompassed 279,971 scientist profiles identified across multiple bibliometric data sources spanning all scientific disciplines, with particular focus on 6,000 scientists in the field of Business and Management in Japan. To qualify for inclusion in the ranking, a scientist’s D-index had to meet a minimum threshold of 30, and the majority of their tier publications needed to be specifically associated with Business and Management. In addition to bibliometric metrics, scientists’ awards and notable achievements within the Business and Management domain were considered as supplementary factors.
The D-index threshold for qualifying top researchers is calibrated in increments of 10, dependent on the estimated total number of scholars within each examined discipline. This approach ensures that the ranking consistently incorporates approximately the top 1% of leading scholars across fields. Furthermore, to maintain consistency, a scientist’s general H-index and their discipline-specific D-index were required to exhibit a proximity difference of 30% or less, guaranteeing the relevance and focus of the ranking on discipline-specific expertise.
Additional Verification Practices
At Research.com, we acknowledge that raw bibliometric data alone can never serve as an absolute tool for evaluating scholarly output. To address this, every scientist profile included in the ranking underwent manual verification and was cross-correlated against publications across a broad spectrum of trusted and authoritative sources. While not directly factored into the ranking position, the quantity of papers published in prominent journals and conference proceedings remains a valuable secondary indicator of a scientist’s research contributions within their specific area of science.
The ranking positions are ultimately established using each researcher’s D-index derived from data gathered via OpenAlex and CrossRef, which are internationally recognized as two of the most prominent and reliable bibliometric databases accessible to the scientific community. For a more detailed understanding of the methodology used in the creation of this ranking, we invite readers to visit our methodology page.
Research.com’s Mission and Agenda
Research.com is dedicated to motivating researchers, academic institutions, corporations, and policymakers worldwide to track and understand the trajectories and areas of focus of leading experts. By providing transparent and rigorously constructed rankings, we aim to facilitate global awareness of who the foremost specialists are within particular disciplines, countries, and research organizations. Our ultimate goal is to cultivate a more informed, connected, and collaborative scientific community that recognizes and supports outstanding research excellence across all domains of knowledge.
