In August 1869, Kagenori discussed with Shigenobu OKUMA who was Okura no taifu (a senior assistant minister of the Ministry of Treasury), Hiroshi NAKAI, Hisanari MACHIDA, etc. concerning new currency issuance at the residence of Okuma (Later Okuma decided to consign the new mint's design to Natsuo KANO in metal carving, Tomoo MASUDA and two other people who were all Kano's apprentices, and the calligraphic characters to Tanko ISHII, a calligrapher who worked for the Ministry of Treasury.)
同年7月、新貨幣発行に関し、大蔵大輔・大隈重信の邸宅にて大隈・中井弘・町田久成等と協議（後に大隈は新貨幣の図案を彫金の加納夏雄と弟子の益田友雄他2名に、文字を大蔵省に勤めている書家の石井単香に委託することを決定）。