Oda Nobunaga wiped out the Iwakura branch of the Oda Family in one stroke, theoretically completing the unification of Owari. For a time, he was on cloud nine, holding banquets and tea gatherings day after day, indulging in his excitement—after all, the Oda Danjo Chonosuke family had risen from a plain, middle-level magistrate family to become a Daimyo over three generations of hard work. If he wasn't excited now, when would he be?
Of course, apart from venting his excitement, these banquets and tea gatherings had their real purposes.
For example, accepting the formal allegiance of the powerful families in the Upper Four Provinces of Owari, officially taking them on as retainer families, and, while he was at it, accepting the treasures, daughters, and hostages they brought along;