Surveillance of injectable antimicrobial consumption was conducted at Rosai-Hospital to elucidate the relationship between carbapenem consumption and imipenem/cilastatin (IPM/CS) or meropenem (MEPM) resistance rates in Pseudomonas aeruginosa in the Tohoku region using the antimicrobial use density (AUD). Some hospitals have high AUD values of third-generation cephalosporins and carbapenems. The consumption of IPM/CS or MEPM and sensibility rates in Pseudomonas aeruginosa are used diŠerently in each facility. This study provided the opportunity to review the appropriate use of speciˆc antimicrobial measures in each facility. In the future, survey of the trends of speciˆc antimicrobial use and surveillance of bacterial susceptibility should be continued to ensure correct use of antimicrobial agents.