He started studying Dutch since 9 years old, and he passed the examination that was taken by 300 people who came in and out Dejima at the age of 19 and became assistant translator, and then became translator in chief at the age of 39.
9歳よりオランダ語を学び、19歳の時に出島出入の者300名による試験に合格して小通詞、39歳で大通詞となる。