The 2025 7th International Conference on Big Data Engineering (BDE 2025) will be held in University of the Ryukyus, Okinawa, Japan during September 24-26, 2025. It is an international forum for sharing knowledge and results in theory, methodology and new advances and research results in the fields of Big Data Engineering. The conference will bring together researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field. The Conference welcomes significant contributions in all major fields of the Big Data Engineering in theoretical and practical aspects. It will put special emphasis on the participations of PhD students, Postdoctoral fellows and other young researchers from all over the world. It would be beneficial to bring together a group of experts from diverse fields to discuss recent progress and to share ideas on open questions. The conference will feature world-class keynote speakers in the main areas.