Dr. Tadafumi Adschiri has pioneered academic research in the field of supercritical water reactions and its related technologies for more than 30 years. His research has focused on the fundamentals and applications of a flow reaction process that has enabled detailed kinetic studies of unusual reactions in supercritical fluids. The results of his research on supercritical water reactions have enabled various applications, such as the world's first supercritical chemical recycling technology and continuous nanoparticle synthesis. His recent research features the creation of new materials (with new functions) using reactions in supercritical water, in which organic and inorganic reactions can be conducted simultaneously to create organic/inorganic composite nanomaterials. The high affinity of organic-modified nanoparticles toward organic solvents or polymers enables the fabrication of highly concentrated nano-inks or high-performance hybrid polymers. These nanoparticles have extremely high torsion inside their structure, which leads to high oxygen-ion mobility even at low temperatures, facilitating the development of a new, low-temperature steam cracking process for hydrogen production. These results have been extensively evaluated by the global scientific community. For his significant scientific accomplishments, he was presented with the Chemical Society of Japan award.