Kai tsusho ko
Ka'i tsûshô kô (roughly, "Thoughts on Commerce among the Civilized and Barbarians") is a 1695 publication by Nishikawa Joken, describing lands and peoples of the world, including maps and illustrations. Joken published an expanded edition, Zôho ka'i tsûshô kô, in 1709. It is perhaps the most famous of Joken's works, and likely that with the most copies extant today; the National Diet Library catalogs nearly 150 copies in libraries across Japan.
The text was originally published in two volumes, covering the lands of China, Korea, Ryukyu, Taiwan, Southeast Asia, and Europe, and their peoples. The expanded edition covers the same topics in an expanded fashion, in five volumes.
- Daniel Said Monteiro, "Celestial Sciences in the Works of Nishikawa Joken (1648-1724)," Historia Scientarium 29-1 (2019), 125.