In September 1689, Kaempfer reached Batavia. He spent the following winter studying Javanese natural history. In May 1690 he set out for Japan as physician to the VOC trading post in Nagasaki. En route to Japan, the ship in which he sailed touched at Siam, whose capital he visited. He recorded his meeting with Kosa Pan, the Siamese Minister and former ambassador to France. In September 1690 Kaempfer arrived in Nagasaki, the only Japanese port then open to Dutch and Chinese ships.