Sahachirō Hata (秦 佐八郎, Hata Sahachirō, March 23, 1873 – November 22, 1938) was a Japanese bacteriologist who assisted in developing the Arsphenamine drug in 1909 in the laboratory of Paul Ehrlich.He was nominated for the Nobel Prize in Chemistry in 1911 and for the Nobel Prize in Physiology or Medicine in 1912 and 1913.Hata was born in Tsumo Village, Mino District, Shimane (now part of Masuda City), and completed his medical education in Kyoto. He studied epidemic diseases under the famous Dr.