上機嫌
Common
I-adj
Noun
1
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi)
good humour (humor);good mood
See also:
不機嫌 (ふきげん)
その子は上機嫌で飛行機に乗り込んだ。
The child got on an airplane in good mood.