In 1721, Yoshimune set the box in front of the Hyojosho (conference chamber) in Tatsunokuchi, Edo-jo Castle (around the north exit of the Tokyo station at present) on 2nd, 11th, and 21st days of every month to collect proposals.
吉宗は1721年に江戸城辰ノ口の評定所前（現在の東京駅北口付近）に毎月2日､11日､21日の月3回設置し、回収した。