It is said that the first dispatch was on February 8 (based on the old calendar), when 6 with fudai daimyo (hereditary vassals to the Tokugawa Family) status, namely, Yoshichika KOIDE, Nagamasa ICHIHASHI, Yoshikatsu MIZOGUCHI, Mitsumasa KOIDE, Kazunao KUWAYAMA and Mitsunobu WAKEBE, were sent as official envoys to various parts of the country.
2月8日(旧暦)に、小出吉親・市橋長政・溝口善勝・小出三尹・桑山一直・分部光信の6名の譜代大名格を正使として各地に派遣したのが最初とされている。