2021.12.3-4 Keynote Lecture  International Conference on Sustainable Environmental Engineering and Science (SEES-2021) Department of Civil Engineering, Sur Institute of technology and Sports Complex (on line)

• Joe Otsuki, "Molecular, Supramolecular, and Nanoplasmonic Approaches towards Light Energy Conversion"

2021.9.4-7 Planery Lecture  17th International Conference of Computational Methods in Sciences and Engineering (ICCMSE 2021) Galaxy Hotel, Crete, Greece and on line

• Joe Otsuki, "Chlorophyll- and Porphyrin-Based Supramolecular Models for the Initial Steps of Photosynthesis"