Henri Kagan and Kenso Soai win Nobel Prize in Chemistry

Henri Kagan and Kenso Soai have been awarded the 2026 Nobel Prize in Chemistry for their groundbreaking research into molecular chirality and asymmetric synthesis. Their work addresses the historical mystery of why biological systems favor specific mirror-image molecular forms, such as left-handed amino acids.

Kagan’s research in the 1980s demonstrated that minimal asymmetry in a catalyst can be amplified during a reaction, known as non-linear effects. Building on this, Soai discovered an asymmetric autocatalytic reaction between 1995 and 2003, achieving the first chemical reaction capable of producing a single mirror-image form, mimicking natural processes.

These discoveries have profound implications for the pharmaceutical industry, as controlling molecular handedness is essential for creating effective drugs and avoiding toxic side effects caused by incorrect enantiomers. The announcement has sparked discussion regarding the research environments in Japan, specifically concerning the academic ties between the University of Tokyo and the Tokyo University of Science.