横滨正金银行
In November 1878, Yoshihara accompanied Matsukata Masayoshi and Aoki Shuzo to Paris in another unsuccessful attempt at revision of the unequal treaties. On February 28, 1880, he was made a director of the Yokohama Specie Bank and also held the post of Vice-Finance Minister. With the creation of the Bank of Japan, per the recommendation of Matsukata Masayoshi, Yoshihara was selected as the 1st Governor of the Bank of Japan on October 6, 1882.