Nagasaki University

EXECUTIVE SUMMARY AND STRATEGIC VISION

Nagasaki University presents a robust and well-balanced scientific integrity profile, reflected in its overall score of -0.116. The institution demonstrates exceptional strengths in foundational areas of research ethics, including extremely low rates of retracted output, publication in discontinued journals, and use of institutional journals, indicating a solid commitment to quality control and external validation. This operational excellence is particularly noteworthy as the university effectively mitigates several systemic risks prevalent at the national level, such as institutional self-citation and redundant publication. Key areas of vulnerability requiring strategic attention include a higher-than-average rate of multiple affiliations, a significant dependency on external collaborations for research impact, and a tendency towards hyperprolific authorship. These factors, while moderate, could challenge the university's mission to "cultivate a fertile creative sense" and "develop innovative science," as they may prioritize metric-driven outcomes over the generation of self-led, foundational knowledge. The institution's strong international standing, evidenced by its SCImago Institutions Rankings data placing it in the top national tier for critical fields like Dentistry (Japan #5), Pharmacology, Toxicology and Pharmaceutics (Japan #17), and Medicine (Japan #25), provides a powerful platform. By leveraging its proven governance strengths to address these identified vulnerabilities, Nagasaki University can further align its operational practices with its core mission, ensuring its contributions to a well-balanced society are built on a foundation of unimpeachable scientific integrity.

ANALYSIS BY INDICATOR

Rate of Multiple Affiliations

With a Z-score of 0.482, Nagasaki University shows a moderate risk level in this indicator, deviating from the low-risk national average of -0.119. This suggests the institution is more sensitive than its national peers to practices involving multiple institutional affiliations. While many of these are legitimate results of researcher mobility or partnerships, a disproportionately high rate can signal strategic attempts to inflate institutional credit through “affiliation shopping.” The observed deviation warrants a review to ensure that collaborative frameworks are structured to reflect genuine scientific contribution rather than primarily for metric enhancement, thereby safeguarding the transparency of institutional achievements.

Rate of Retracted Output

The institution demonstrates an exceptionally strong performance with a Z-score of -0.550, indicating a very low risk profile that is even more robust than the low-risk national standard (-0.208). This absence of risk signals aligns perfectly with a culture of high scientific integrity. Retractions can be complex, but a rate significantly below the norm, as seen here, suggests that the university's quality control and supervision mechanisms prior to publication are highly effective. This result points to a mature and responsible integrity culture, where methodological rigor and internal checks prevent systemic errors or malpractice, reinforcing the institution's reputation for reliable science.

Rate of Institutional Self-Citation

Nagasaki University exhibits notable institutional resilience in this area. Its low-risk Z-score of -0.372 stands in positive contrast to the medium-risk national average of 0.208. This indicates that the university's control mechanisms successfully mitigate a systemic risk observed across the country. While some self-citation is natural, the university avoids the disproportionately high rates that can signal scientific isolation or 'echo chambers.' This performance suggests that the institution's academic influence is validated by the broader global community rather than being inflated by endogamous internal dynamics, reflecting a healthy integration into international scientific discourse.

Rate of Output in Discontinued Journals

With a Z-score of -0.367, the institution maintains a very low-risk profile, consistent with and slightly better than the low-risk national average (-0.328). This result highlights a commendable level of due diligence in the selection of dissemination channels for its research. A low proportion of publications in discontinued journals is a strong indicator that the university's researchers are well-informed and avoid predatory or low-quality venues. This protects the institution from severe reputational risks and ensures that scientific resources are invested in credible, internationally recognized platforms, maximizing the impact and integrity of its output.

Rate of Hyper-Authored Output

The institution's Z-score of 0.718 places it in the medium-risk category, similar to the national average of 0.881. However, the university's score is discernibly lower, suggesting a more differentiated management of a risk that appears common in the country. While extensive author lists are legitimate in 'Big Science,' a medium-risk score outside these contexts can signal author list inflation, which dilutes individual accountability. Nagasaki University appears to moderate this national trend, indicating a greater capacity to distinguish between necessary massive collaboration and potentially problematic 'honorary' authorship practices, though continued monitoring is advisable.

Gap between Impact of total output and the impact of output with leadership

Nagasaki University's Z-score of 1.232 indicates a medium-risk level, which is notably higher than the national average of 0.809. This suggests the institution has a high exposure to sustainability risks related to its scientific impact. The wide positive gap reveals that while the university's overall impact is significant, much of it is derived from collaborations where it does not exercise intellectual leadership. This signals that its scientific prestige may be overly dependent and exogenous, not yet fully structural. This finding invites a strategic reflection on building internal capacity to ensure that its high-impact research is increasingly a result of its own foundational leadership.

Rate of Hyperprolific Authors

With a Z-score of 0.425, the university shows a medium risk level, exceeding the national medium-risk average of 0.288. This indicates a higher exposure to the risks associated with extreme individual productivity. While high output can reflect leadership, publication volumes that challenge the limits of meaningful intellectual contribution can signal an imbalance between quantity and quality. This heightened score serves as an alert to potential risks such as coercive authorship or the assignment of authorship without real participation—dynamics that prioritize metrics over the integrity of the scientific record and warrant closer institutional oversight.

Rate of Output in Institutional Journals

The institution's Z-score of -0.268 represents a state of total operational silence in this risk area, performing even better than the very low national average (-0.139). This is a significant strength, demonstrating a complete absence of signals related to academic endogamy. By not relying on in-house journals, which can present conflicts of interest by having the institution act as both judge and party, the university ensures its scientific production consistently undergoes independent external peer review. This commitment to external validation enhances the global visibility and credibility of its research, avoiding any perception of using internal channels as 'fast tracks' to inflate productivity.

Rate of Redundant Output

Nagasaki University demonstrates strong institutional resilience against redundant publications, with a low-risk Z-score of -0.411 that contrasts sharply with the medium-risk national average of 0.778. This suggests that the university's internal controls and academic culture effectively mitigate the systemic national trend toward data fragmentation or 'salami slicing.' By maintaining a low rate of bibliographic overlap between publications, the institution shows a clear preference for presenting coherent, significant studies over artificially inflating productivity metrics. This practice upholds the integrity of the scientific evidence base and respects the resources of the peer-review system.