In 1836, after he visited Koan OGATA at his school of western sciences in Osaka, under Koan's instruction he entered the school of Shindo TSUBOI, who was a Dutch scholar in Edo, and became the head of the school.
1836年　適塾に緒方洪庵を訪ね、洪庵の指示により、江戸の蘭学者である坪井信道の門に入り塾頭となる