New Year's party
General term for a party or gathering held to celebrate the New Year. Often used interchangeably with 新年会.
See also: 新年会
We toasted at the company's New Year's party.
imperial New Year's banquet
Historical term for the annual banquet held by the emperor on January 5, prior to WWII. Not used for modern events.
Before the war, the imperial New Year's banquet was held at the palace.