In 1856, he entered the Naval Training Center in Nagasaki, which had been newly established by bakufu (Japanese feudal government headed by a shogun), where he studied the international situation, Western studies called Rangaku, seamanship, chemistry, etc.
安政3年（1856年）には幕府が新設した長崎海軍伝習所に入所、国際情勢や蘭学と呼ばれた西洋の学問や航海術・舎密学（化学）などを学んだ。