first shopping of the new year; New Year's shopping on January 2
Refers specifically to the custom of going shopping on January 2, the first business day after the New Year holiday. Often associated with 初売り (first sale of the year).
See also: 初売り
Many people go out for their first shopping of the new year on January 2.
Compound of 初 (first) and 買い (buying), referring to the first purchase or shopping trip of the new year.