In the intercalary fifth month of 1664, Tsunakatsu UESUGI, the lord of the Yonezawa domain, died suddenly without an heir, so the family plunged into a crisis of being deprived of samurai status and forfeited its territories.
寛文4年（1664年）閏5月、米沢藩主上杉綱勝が嗣子なきまま急死したために改易の危機に陥った。