This three-volume set of CCD 2023, constitutes the refereed proceedings of the 25th International Conference on Cross-Cultural Design, CCD 2023, held as Part of the 24th International Conference, HCI International 2023, which took place in July 2023 in Copenhagen, Denmark. The total of 1578 papers and 396 posters included in the HCII 2023 proceedings volumes was carefully reviewed and selected from 7472 submissions. The papers of CCD 2023, Part I address topics related to service and product design for cultural innovation, design for social change and development, sustainable design methods and practices, and cross-cultural perspectives on design and consumer behavior.