be in a good mood
彼は今日は上機嫌だ。
He’s in a good mood today.
トムは上機嫌だ。
Tom is in a good mood.
トムは今日は上機嫌だなぁ。
Tom is in a really good mood today.
ロビンソンさんの病気は深刻なものだが、彼は上機嫌だ。
Mr. Robinson's illness is serious, but he is in good spirits.