In 1770, he went down to Nakatsu by joining the head of the domain on his return home for sankinkotai (a system under which feudal lords in the Edo period were required to spend every other year in residence in Edo) and left for Nagasaki to study.
その後、1770年（明和7年）藩主の参勤交代について中津に下向した際、長崎へと留学した。