In 1863 five noblemen of the Choshu clan left Japan to study at UCL. No one from Japan had previously studied outside their own country and they had to keep their departure hidden from the government. They studied Chemistry with Professor Alexander Williamson and also lived at his home. In 1865 a group of nineteen noblemen of the Satsuma clan did the same. The students returned home and became key in the development of modern Japan. Issuu contains details.