He then took part in Hidetada TOKUGAWA's army in the Siege of Ueda-jo Castle, but Masayuki SANADA who was castle-side, fought well and forced Hidetada's army to a standstill.
そして、徳川秀忠軍に従軍して上田城攻めに参加したが、城方の真田昌幸の善戦により秀忠軍は足止めを食った。