Aim: To develop and measure the psychometric properties of the Gambling and Gambling Problem Perception Questionnaire (GGPPQ); a scale to evaluate professionals’ attitudes towards people with problem gambling in the Japanese context. Data collection: We held 12 workshops in Japan targeted at mental health professionals who consult people with gambling problems. Participants completed the survey before the workshop. Some were also asked to complete the survey after the workshop to measure workshop influence. Setting: Public and private healthcare facilities in all 47 prefectures of Japan. Participants: Medical doctors, nurses, social workers, clinical psychologists, and other professionals working in the aforementioned facilities ( n = 653, response rate = 98.5%). Measurements: licence; knowledge about gambling and gambling problems (questionnaire); self-rating of knowledge and general confidence for helping problem gamblers; years of practice; frequency of working with clients; experience in attending workshops; overall satisfaction with the workshop. Results: A five-factor structure extracted by exploratory factor analysis showed a good fit by confirmatory factor analysis (CFI = .973, TLI = .967, RMSEA = .060, AIC = 28913.6, BIC = 29110.8). The GGPPQ showed good internal consistency and good concurrent validity with participants’ self-rating of their knowledge, general confidence, frequency of working with clients who have gambling problems, and experience in attending workshops. The workshop had a positive influence on participants’ attitudes. Japan's unique gambling industry and lack of training opportunities on problem gambling were assumed to have influenced the psychometric properties of the measurement tool. Conclusion: The GGPPQ is a valid tool to measure the attitudes of healthcare professionals towards people with gambling problems, as well as workshop effectiveness in Japan.

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AimStigma among healthcare professionals toward people who use drugs (PWUDs) must be addressed for recovery. However, research on this topic is limited in Japan, therefore we developed a brand‐new scale through coproduction with PWUDs to measure stigma and conducted a survey using the developed scale to examine what influences stigma towards PWUDs in Japanese healthcare settings.MethodsBased on interviews with PWUDs and their families, we developed a survey containing 24 questions on stigma toward PWUDs. The survey was sent to healthcare professionals working in the public sector. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted to determine the factor construct. Generalized linear mixed model (GLMM) analyses with each factor of the stigma questions set as a dependent variable were conducted to discover the specific contribution of each variable to professionals' stigma.ResultsThe six factors suggested by the EFA showed a good fit, as confirmed by the CFA of the stigma questions. GLMM discovered that “currently providing treatment services to PWUDs,” “having PWUDs close to themselves,” and “experiencing violence by the client when providing treatment services” were significantly associated with higher stigma scale scores. “Experience in receiving support,” “attending self‐help groups,” and “using peer‐based recovery support with PWUDs” were significantly associated with lower stigma scale scores.ConclusionThe scale coproduced with local PWUDs can be a reliable tool to measure the stigma PWUDs face in Japan. Further results indicate that interaction with recovered PWUDs should be promoted.