AIM: This study aimed to identify the current situation of interprofessional collaboration for gestational diabetes mellitus (GDM) management in Japan including the professionals involved, the collaboration methods employed, and the barriers perceived by nurses and midwives. METHODS: This nationwide cross-sectional survey of 1,046 total hospitals facilitating childbirth in Japan used an original 60-item questionnaire to investigate GDM management practice through interprofessional collaboration. The questionnaire required one responder to be a midwife or nurse who was familiar with the management practices for GDM women in their respective hospitals. Quantitative data were analyzed using descriptive statistics, and framework analysis was conducted for qualitative data collected by open-ended questions. RESULTS: All 308 respondents (response rate 29.4%) were included. The professionals included in interprofessional collaboration were limited, and the only strategy used for interprofessional collaboration by a majority (91.5%) of hospitals was medical charts. There were 50.8% of hospitals that provided postpartum GDM follow-ups and 54.5% of hospitals that did not engage in external collaboration for GDM management. The barriers to interprofessional collaboration extracted were seven categories and 23 subcategories, which were aligned within the following units of analysis: individual, team, organization, and community. CONCLUSIONS: This survey shows that interprofessional collaboration, including support for GDM postpartum follow-up in Japan remains insufficient. Furthermore, nurses and midwives perceive numerous barriers to interprofessional collaboration for continuous GDM management at the individual, team, organizational and community levels.