noun
cherry blossom viewing party
A formal or organized gathering to enjoy cherry blossoms, often held by companies, schools, or social groups.
会社の観桜会は来週の土曜日に開かれます。
The company's cherry blossom viewing party will be held next Saturday.
花見 is the common, casual term for cherry blossom viewing. 観桜会 is more formal and implies an organized event.
Compound of 観 (viewing), 桜 (cherry blossoms), and 会 (gathering).