Five years have passed since the Japan Nursing Association started the Diagnostic Service for Improving Labor and Nursing Quality (DiNQL). We have participated in DiNQL data input support analysis activities since 2013, and the DiNQL Promotion Committee was launched in 2015. Here, we report on the activities of the DiNQL Promotion Committee and evaluate the results of these activities. The DiNQL Promotion Committee's four main activities involve being in charge of the floor at meetings, clarifying the input method aimed at shortening data collection time, supporting analysis of the DiNQL data input, and holding workshops for analysis and utilization. A self-administered questionnaire was administered to 43 ward nursing managers (including section chiefs and managers) to evaluate these committee activities. Both section chiefs and clerical staff responded that DiNQL data input time was shortened by more than 90%. Section chiefs comprised 64% and managers 79% of those who responded that DiNQL data could be utilized for determining annual departmental goals. In total, 71% of managers and 50% of section chiefs responded that DiNQL data is useful for nursing management. Based on these results, we confirmed that setting up the DiNQL Promotion Committee and its activities has led to nursing management support.