Koichi Tanaka, Japanese chemist and engineer, Nobel Prize laureate
Koichi Tanaka (田中 耕一, Tanaka Kōichi, born August 3, 1959) is a Japanese electrical engineer who shared the Nobel Prize in Chemistry in 2002 for developing a novel method for mass spectrometric analyses of biological macromolecules with John Bennett Fenn and Kurt Wüthrich (the latter for work in NMR spectroscopy).