The Sengoro family had scripts of Torahiro-bon (scripts written by Torahiro) that was gifted from the head family of the Kyogen school during Masatora's apprenticeship in Edo (present Tokyo), however, the times had changed and there were considerable differences in detail between these scripts and those of the Sengoro family, so it was required to newly rewrite the original scripts for the Sengoro family.
千五郎家には正虎が江戸での修行時代に家元より拝領した虎寛本系の台本があるにはあったが、既に時代も変わり、実際の千五郎家の狂言とは細部においてかなり違いが生じていたので、千五郎家の証本を新たに作り直す必要があったのである。