There was a rumor that Kira Kozuke no Suke might be moving to Yonezawa-jo Castle, since his biological son Tsunanori UESUGI (150,000 koku) was working as the lord of Yonezawa Domain in Dewa Province.
またさらに吉良上野介には実子として出羽国米沢藩主上杉綱憲（15万石）がいたので、吉良が米沢城に移るという噂もたった。