Tachiai was a trial day, and the Sobayonin and those who stayed in Edo on business, such as Kyoto shoshidai, Osaka jodai, and the Ongoku-bugyo, sometimes attended as well.
立合は裁判が行われる日で、側用人や在府中の京都所司代・大坂城代・遠国奉行なども列席する場合があった。