Though he aided his father for a time, ultimately his younger brother [[Yoshida Sojun|Yoshida Sôjun]] took over the family business as a physician and merchant of medicines; Ryôi took the trade-name (''[[yago|yagô]]'') Suminokura and turned to other trades. He made annual trips to Tonkin (today, northern Vietnam) along with his son [[Suminokura Soan]], beginning in [[1603]]. Not only an active trader, he also helped prepare diplomatic documents for the shogunate, with the help of the likes of [[Fujiwara Seika]] and [[Hayashi Razan]] (an indication of the kinds of contacts he had and circles he traveled in), and served as a messenger for the shogunate in delivering to and receiving messages from foreign lords, such as the Trinh of Tonkin.<ref name=china/> | Though he aided his father for a time, ultimately his younger brother [[Yoshida Sojun|Yoshida Sôjun]] took over the family business as a physician and merchant of medicines; Ryôi took the trade-name (''[[yago|yagô]]'') Suminokura and turned to other trades. He made annual trips to Tonkin (today, northern Vietnam) along with his son [[Suminokura Soan]], beginning in [[1603]]. Not only an active trader, he also helped prepare diplomatic documents for the shogunate, with the help of the likes of [[Fujiwara Seika]] and [[Hayashi Razan]] (an indication of the kinds of contacts he had and circles he traveled in), and served as a messenger for the shogunate in delivering to and receiving messages from foreign lords, such as the Trinh of Tonkin.<ref name=china/> |