Kenichi Fukui was a groundbreaking Japanese chemist and the first person of East Asian descent to be awarded the Nobel Prize in Chemistry. He shared the 1981 prize with Roald Hoffmann for their independent investigations into the mechanisms of chemical reactions. Fukui is best known for developing the frontier molecular orbital theory, which explains the role of specific electron orbitals in determining reaction pathways. His work fundamentally changed the understanding of chemical reactivity and continues to influence theoretical chemistry today.