This two-volume set constitutes the proceedings  of the  19th International Conference on Computer Science and Education, ICCSE 2025, held in Osaka & Fukui, Japan, during August 19&24, 2025. The 82 full papers and 2 short papers presented were thoroughly reviewed and selected from the 196 submissions.  They were focused on the following topical sections: Part I :  AI Technology Frontiers- Computer Science and Data Science; Artificial Intelligence and Machine Learning and Natural Language Processing and Text Analytics Part II :  AI Shaping Education- AI Applications in Education and Teaching Models and Educational Reform.