Japanese trader who became a leader in the overseas Japanese community of Annam (modern Vietnam). Kadoya left Japan for Annam in 1631 and settled in a Japanese community near Tourane (now Da Nang). When, two years later, the Tokugawa shogunate issued a decree forbidding Japanese subjects to travel or trade abroad, Kadoya chose to remain in Annam. He married an Annamese noble's daughter and built a Shintō shrine for the Japanese community. He never returned to Japan but, about 30 years later, was able to resume trade with Japan.