| Indicator | University Z-score | Average country Z-score |
|---|---|---|
|
Multi-affiliation
|
-0.766 | -0.119 |
|
Retracted Output
|
-0.381 | -0.208 |
|
Institutional Self-Citation
|
-0.450 | 0.208 |
|
Discontinued Journals Output
|
-0.395 | -0.328 |
|
Hyperauthored Output
|
7.632 | 0.881 |
|
Leadership Impact Gap
|
-1.394 | 0.809 |
|
Hyperprolific Authors
|
4.253 | 0.288 |
|
Institutional Journal Output
|
-0.268 | -0.139 |
|
Redundant Output
|
10.361 | 0.778 |
Hamamatsu University School of Medicine demonstrates a strong overall performance profile (Overall Score: 0.936), characterized by a notable dichotomy between exceptional integrity in publication quality and significant risks in authorship and productivity practices. The institution exhibits robust control in critical areas, with very low risk signals for retracted output, publications in discontinued journals, and reliance on institutional journals. Furthermore, it shows a remarkable capacity for independent intellectual leadership, outperforming national trends. However, this solid foundation is contrasted by significant alerts in the rates of hyper-authored output, hyperprolific authors, and redundant publications. Thematically, the university holds a strong national position in key areas such as Psychology, Pharmacology, Toxicology and Pharmaceutics, and Medicine, according to SCImago Institutions Rankings data. These achievements align with its mission to foster highly skilled professionals, yet the identified risks in authorship and publication volume could challenge the commitment to cultivating researchers "well trained and versed in medical ethics." An overemphasis on quantitative metrics may conflict with the pursuit of being "highly academic." To safeguard its reputation and fully align its practices with its mission, a strategic review of authorship policies and productivity incentives is recommended to ensure that scientific contributions are valued for their substance and integrity above all.
With a Z-score of -0.766, the institution displays a more prudent approach to multiple affiliations compared to the national average of -0.119. This suggests the university manages its collaborative processes with greater rigor than the national standard, maintaining clear and well-defined affiliation policies. While multiple affiliations are often a legitimate result of researcher mobility or partnerships, the institution's conservative profile indicates that strategic attempts to inflate institutional credit or “affiliation shopping” are not a concern, reflecting a healthy and transparent collaborative ecosystem.
The institution's Z-score of -0.381 for retracted output is very low, positioning it favorably within a national context that already shows minimal risk (Z-score: -0.208). This absence of significant risk signals aligns with the national standard and points toward effective quality control mechanisms prior to publication. Retractions are complex events, but a rate significantly lower than the global average is a strong indicator of a healthy integrity culture, suggesting that issues of methodological rigor or potential malpractice are being successfully prevented before they can damage the scientific record.
The university demonstrates notable institutional resilience with a Z-score of -0.450, starkly contrasting with the moderate national average of 0.208. This indicates that the institution’s control mechanisms effectively mitigate the systemic risk of self-citation prevalent in the country. A certain level of self-citation is natural, but the university’s low rate signals that it avoids the 'echo chambers' that can lead to endogamous impact inflation. This result suggests the institution's academic influence is validated by the broader global community rather than being oversized by internal dynamics.
With a Z-score of -0.395, the institution shows a very low rate of publication in discontinued journals, consistent with the low-risk national environment (Z-score: -0.328). This alignment demonstrates strong due diligence in the selection of dissemination channels for its research. A low proportion of output in such journals is a critical sign of health, indicating that the institution is effectively avoiding reputational risks and the waste of resources associated with 'predatory' or low-quality publishing practices, thereby protecting the integrity of its scientific contributions.
A significant alert is raised by the institution's Z-score of 7.632 in hyper-authored output, a figure that dramatically amplifies the moderate vulnerability already present in the national system (Z-score: 0.881). In disciplines like high-energy physics, extensive author lists are legitimate; however, when this pattern appears outside 'Big Science' contexts, it can indicate author list inflation, which dilutes individual accountability. This high value serves as an urgent signal to investigate whether these extensive collaborations are scientifically necessary or if they reflect 'honorary' or political authorship practices that compromise transparency.
The institution demonstrates a clear preventive isolation from national trends, with a Z-score of -1.394, while the country shows a moderate positive gap (Z-score: 0.809). This result indicates that the university does not replicate the risk dynamics of dependency observed elsewhere. A wide positive gap often signals that prestige is reliant on external partners. In contrast, the institution's negative gap is a sign of exceptional strength, suggesting that its scientific prestige is structural and endogenous. This reflects a high degree of real internal capacity, where the institution exercises strong intellectual leadership in its research endeavors.
The institution's Z-score of 4.253 for hyperprolific authors constitutes a critical area of concern, as it significantly accentuates the moderate risk seen at the national level (Z-score: 0.288). While high productivity can evidence leadership, extreme individual publication volumes challenge the limits of meaningful intellectual contribution. This indicator alerts to a potential imbalance between quantity and quality, pointing to risks such as coercive authorship or the assignment of authorship without real participation. These dynamics prioritize metrics over the integrity of the scientific record and warrant an immediate internal review.
With a Z-score of -0.268, the institution shows a complete absence of risk signals related to publishing in its own journals, performing even better than the very low-risk national average (Z-score: -0.139). This operational silence indicates a strong commitment to independent, external peer review. By avoiding excessive dependence on in-house journals, the university mitigates potential conflicts of interest and the risk of academic endogamy. This practice ensures its scientific production is validated through standard competitive channels, enhancing its global visibility and credibility.
The most severe risk identified is the institution's rate of redundant output, with a Z-score of 10.361 that represents a critical amplification of the moderate vulnerability within the national system (Z-score: 0.778). Such massive and recurring bibliographic overlap between publications is a strong indicator of data fragmentation or 'salami slicing.' This practice, where a single study is divided into minimal publishable units to artificially inflate productivity, distorts the available scientific evidence and overburdens the review system. This finding suggests an urgent need to address publication strategies that prioritize volume over the generation of significant new knowledge.
