| Indicator | University Z-score | Average country Z-score |
|---|---|---|
|
Multi-affiliation
|
-0.734 | -0.119 |
|
Retracted Output
|
-0.400 | -0.208 |
|
Institutional Self-Citation
|
-0.369 | 0.208 |
|
Discontinued Journals Output
|
-0.311 | -0.328 |
|
Hyperauthored Output
|
0.755 | 0.881 |
|
Leadership Impact Gap
|
1.626 | 0.809 |
|
Hyperprolific Authors
|
-0.476 | 0.288 |
|
Institutional Journal Output
|
-0.268 | -0.139 |
|
Redundant Output
|
0.759 | 0.778 |
Nihon University presents a robust scientific integrity profile, with an overall risk score of -0.191 that indicates performance superior to the global average. The institution demonstrates significant strengths in maintaining low-risk levels for practices such as retractions, institutional self-citation, and publication in its own journals, often outperforming national benchmarks and showcasing effective internal governance. However, areas requiring strategic attention have been identified, particularly a medium-risk exposure to hyper-authorship, redundant publications, and a notable gap between its overall research impact and the impact of work where it holds intellectual leadership. According to SCImago Institutions Rankings data, the university's academic excellence is most prominent in specialized fields, ranking within the top 10 in Japan for Dentistry, Veterinary, and Earth and Planetary Sciences. While these achievements are commendable, the identified risk related to dependency on external collaborations for impact could challenge the university's mission to "cultivate the spirit of independent creativity" and conduct "in-depth academic research." To fully align its operational practices with its foundational values, it is recommended that the university focuses on strengthening internal research leadership and promoting publication strategies that prioritize substantive contribution over volume, thereby ensuring its legacy of excellence is both independent and sustainable.
With a Z-score of -0.734, significantly lower than the national average of -0.119, Nihon University demonstrates a prudent and well-managed approach to academic collaboration. This indicates that the institution's processes are managed with more rigor than the national standard. While multiple affiliations are often a legitimate result of researcher mobility or partnerships, the university's comparatively low rate suggests a clear and transparent framework for affiliations that effectively avoids strategic attempts to inflate institutional credit or engage in “affiliation shopping,” reinforcing a culture of accountability.
The university's Z-score of -0.400 for retracted publications is exceptionally low, positioning it favorably against Japan's national score of -0.208. This low-profile consistency, where the absence of risk signals aligns with an already low-risk national standard, points to highly effective quality control mechanisms. Retractions can sometimes signify responsible supervision through the correction of honest errors, but such a minimal rate strongly suggests that the institution's pre-publication review processes and integrity culture are robust, systemically preventing the methodological or ethical failures that often lead to retractions.
Nihon University exhibits strong institutional resilience with a Z-score of -0.369, in stark contrast to the national medium-risk average of 0.208. This demonstrates that the university's control mechanisms successfully mitigate a systemic risk prevalent in the country. A certain level of self-citation is natural, but the university's low rate indicates that its research is validated by the broader international community, avoiding the 'echo chambers' that can arise from excessive self-referencing. This commitment to external scrutiny ensures its academic influence is based on global recognition rather than being inflated by internal dynamics.
The institution's Z-score of -0.311 for publications in discontinued journals is statistically normal and aligns closely with the national average of -0.328. This suggests the risk level is as expected for its context and size. While a sporadic presence in such journals can occur, the university's low rate indicates that its researchers generally perform adequate due diligence in selecting reputable dissemination channels, thereby protecting the institution from the most severe reputational risks associated with predatory or low-quality publishing practices.
With a Z-score of 0.755, the university shows a medium-risk signal for hyper-authored publications, though it demonstrates differentiated management by maintaining a rate below the national average of 0.881. This suggests the institution moderates a risk that is common in the country. While extensive author lists are legitimate in 'Big Science,' this indicator warrants attention to ensure that authorship across all fields reflects genuine intellectual contribution. The university should continue its efforts to distinguish between necessary massive collaboration and 'honorary' authorship, thereby reinforcing individual accountability and transparency.
The university's Z-score of 1.626 reveals a high exposure to this risk indicator, significantly exceeding the national average of 0.809. This wide positive gap, where overall impact is much higher than the impact of research led by the institution, signals a critical sustainability risk. It suggests that the university's scientific prestige may be overly dependent and exogenous, stemming from collaborations where it does not exercise primary intellectual leadership. This finding invites urgent reflection on whether its high-impact metrics reflect true internal capacity or strategic positioning, a dynamic that could challenge its mission to foster "independent creativity."
Displaying notable institutional resilience, Nihon University has a Z-score of -0.476 for hyperprolific authors, a low-risk value that stands out against the national medium-risk average of 0.288. This indicates that internal control mechanisms are effectively mitigating a systemic national trend. While high productivity can be legitimate, extreme publication volumes often challenge the limits of meaningful contribution. The university's low score suggests a healthy institutional culture that prioritizes the quality and integrity of the scientific record over sheer quantity, successfully avoiding potential imbalances and coercive authorship dynamics.
The university demonstrates total operational silence in this area, with an exceptionally low Z-score of -0.268 that is even better than the country's very low average of -0.139. This absence of risk signals, even below the national baseline, highlights a profound commitment to independent, external peer review. By avoiding reliance on its own journals, the institution effectively eliminates potential conflicts of interest and risks of academic endogamy, ensuring its scientific production is validated through standard competitive channels and maximizing its global visibility.
The institution's Z-score of 0.759 for redundant output reflects a systemic pattern, as it is nearly identical to the national average of 0.778. This alignment suggests that the medium-risk level is influenced by shared practices or pressures within the national academic system. A high value in this indicator alerts to the practice of dividing a coherent study into 'minimal publishable units' to artificially inflate productivity. This trend warrants institutional attention to ensure that research prioritizes the generation of significant new knowledge over the fragmentation of data, which can distort scientific evidence.
