TANAKA showed his enthusiasm into the business not only for protecting his family business, but he also did for establishing Forty Second National Bank at 3-chome, Edobori along with Jinbee KANAZAWA, and he became president of it and showed leadership.
田中の商業上の熱意は単に家業を守ることだけにとどまらず、1877年（明治10年）には早くも金沢仁兵衛とともに、第四十二国立銀行を江戸堀三丁目に設立して、その頭取となり、その頭角をあらわしはじめた。