The 15th International Workshop on Advanced Distributed and Parallel Network Applications (ADPNA-2020) will be held in conjunction with the 24th International Conference on Network-Based Information Systems (NBiS-2022) at Asia University, Taichung, Taiwan on September 1st - September 3rd, 2021, The ADPNA-2021 covers novel theories, designs, and applications on distributed and parallel computing systems. Various types of computers are interconnected in communication networks. Networks of today are going through a rapid evolution and are giving a great influence to our society. In addition, computing models are changing to new architecture like Croud computing model. For this reason, it is significant to discuss how to design and realize high-performance computation models and network applications for distributed and parallel systems. The ADPNA-2021 International Workshop seeks original contributions in all relevant areas, including but not limited to the following topics. Papers of high quality in the following areas will be invited: TOPICS: Cloud, IoT, and P2P Computing Ad Hoc and Sensor Networks Mobile Networks and Applications Distributed Database and Data Mining Internet Computing and Web Applications Agent and Intelligent Computing Communication Technology and Protocols Dependable and Autonomic Systems Distributed and Parallel Algorithms Fault-tolerant and Dependable System Multimedia Tools and Applications Network Control and Performance Evaluation IMPORTANT DATES Paper Submission Deadline : June 5, 2021 Author Notification : June 15, 2021 Author Registration : June 25, 2021 Final Manuscript Due : June 25, 2021 Workshop Dates : September 1 - September 3, 2021 PAPER SUBMISSION GUIDELINE Authors should submit a paper to the ADPNA-2021 workshop with maximum 10 pages in length, including all figures, tables, and references. However, authors can add up to 2 extra pages with the appropriate fee payment. Papers must be prepared using the Lecture Notes Style of Springer Proceedings. Template for Paper NBiS-2021 Submission Guidelines for Review Prepare your paper and submit it electronically to the EDAS online submission system: https://edas.info/N27990 Please select the track: "W-ADPNA-2021: The 15th International Workshop on Advanced Distributed and Parallel Network Application (ADPNA-2021)". All accepted papers of the ADPNA workshops will be included in the conference proceedings of Lecture Notes in the Advances in Intelligent Systems and Computing book series published by Springer. Proceedings will be sent by Springer for indexing in EI and SCOPUS, ISI Proceedings, MetaPress, Springerlink. Accepted papers will be given guidelines in preparing and submitting the final manuscript(s) together with the notification of acceptance. Authors of accepted papers, or at least one of them, are requested to register and present their work at the workshop. Plase do follow the announcement on the NBiS-2021 website. ORGANIZING COMMITTEE Workshop Organizers: Makoto Takizawa, Hosei University, Japan Leonard Barolli, Fukuoka Institute of Technology (FIT), Japan Workshop Chair: Tomoya Enokido, Rissho University, Japan