The unique idea behind 2024 The 13th International Conference on Nanostructures, Nanomaterials and Nanoengineering (ICNNN 2023) and 2024 The 9th International Conference on Materials Technology and Applications (November 6th to 8th, 2024, Osaka, Japan) was to provide an opportunity for leading academicians, scientists, researchers and industry professionals from around the world to network and have a scientific discussion on the latest advancements in the interlinked domains of materials science, technologies and engineering, to present their research works, promote scholarly exchanges, expound new ideas, and incubate academic collaborations on creating new innovative decisions.