Objective:Marketing specialists (MSs) from pharmaceutical wholesalers might shore up post-marketing surveillance (PMS) by pharmaceutical manufacturers. The purposes of this study were as follows: to research problems in PMS found by market specialists, to find solutions for these problems, and motivating MSs to work on PMS. Methods: We conducted a workshop with 12 MSs, who were already working on PMS operations. Participants were divided into three groups. Each group discussed problems with their PMS operations using the KJ method, discussed the potential solutions for the problems, and finally presented them in a plenary debate session. Questionnaire surveys were conducted for the participants before, immediately after, and 6 months after the workshop. Results: This workshop revealed two crucial and urgent problems on PMS faced by MSs: lack of feedbacks to clinical site and lack of publicity of the significance of PMS by MSs. Several solutions were suggested: browsing system of collected information, publication of the stages of improvement in pharmaceutical preparations and packaging, and distributing leaflets about PMS by MSs. In addition, this workshop conferred a positive influence on the participants: in the post-workshop questionnaires, most of the participants answered that they could well understand the problems (92%) and the solutions (75%) on PMS, and that they could improve their attitudes toward PMS operations (83%). . Conclusion: This workshop was quite effective for most of the participants in searching the problems, considering the solutions, and improving their attitudes. Organization of several such workshops might result in better PMS by MSs.