Nagai Nagayoshi was a notable Japanese organic chemist and pharmacologist, best known for his study of ephedrine.
He studied at Tokyo Imperial University, and became the first doctor of pharmacy in Japan. He was sent under government sponsorship to Prussia in 1871 to study at the University of Berlin. In 1923, Nagai and his wife hosted Albert Einstein and his wife during their visit to Japan.
Read more about Nagai Nagayoshi on Wikipedia.