Nishikawa Joken (西川 如見, 1648 – November 9, 1724) was an Edo period Japanese geographer and astronomer, and author of the encyclopaedic text Ka'i tsūshō...

Commandery (安定郡). He also established the office of the Commandant of Xichuan (西川都尉) to oversee their safety. For his efforts, Guo Huai was promoted to General...