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Thus, ensuring appropriate antimicrobial therapy is crucial in global and national AMR countermeasures. This narrative review aimed to summarize pharmacist-led antimicrobial stewardship interventions in Japan and discuss their practical and clinical significance across inpatient, outpatient, and community settings. In inpatient care, antimicrobial stewardship programs (ASPs), usually embedded within antimicrobial stewardship teams and supported by national policies and reimbursement incentives, have consistently reduced broad-spectrum antibiotic use (e.g., carbapenems). ASPs improve microbiological indicators such as\n                    <jats:italic>Pseudomonas aeruginosa<\/jats:italic>\n                    susceptibility while maintaining patient safety. The evidence of ASP efficiency spans large tertiary hospitals that consider post-prescription review with feedback and expanded prospective audit-and-feedback. In addition, small-to-medium hospitals that adopt pharmacist-led programs have demonstrated improved key process measures (culture acquisition, de-escalation, and duration of therapy), as well as optimized clinical outcomes in selected high-risk subgroups. Given that outpatient oral antibiotics account for a substantial proportion of total consumption, ASPs are increasingly being recognized as an essential approach. Reported pharmacist-led interventions include monitoring and feedback to high-prescription departments, regimen optimization based on susceptibility data, and dental outpatient programs that shift prescriptions from third-generation cephalosporins toward guideline-recommended penicillins. At the community level, regional educational outreach with surveillance feedback and peer-comparison approaches, as well as community pharmacy-based prescription optimization, have demonstrated meaningful shifts toward narrower-spectrum agents. Pharmacist-led ASPs in Japan have largely benefitted inpatients, whereas outpatient and community stewardship remains an essential frontier requiring enhanced implementation and rigorous assessment of patient-centered outcomes.\n                  <\/jats:p>","DOI":"10.1186\/s40780-026-00551-9","type":"journal-article","created":{"date-parts":[[2026,2,9]],"date-time":"2026-02-09T08:46:19Z","timestamp":1770626779000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Practical and clinical significance of the pharmacist-led antimicrobial stewardship"],"prefix":"10.1186","volume":"12","author":[{"given":"Takumi","family":"Umemura","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,2,9]]},"reference":[{"key":"551_CR1","unstructured":"World Health Organization. Global action plan on antimicrobial resistance. 2016. 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