Fukubukuro is part of what Japanese festical celebrated on January 1st sine 1873?
Fukubukuro: Fukubukuro (福袋 ) is a Japanese New Year custom in which merchants make grab bags filled with unknown random contents and sell them for a substantial discount, usually 50% or more off the list price of the items contained within. Japanese New Year:  Since 1873, the official Japanese New Year has been celebrated according to the Gregorian calendar, on January 1 of each year, New Year's Day (元日 , Ganjitsu ) .
Japanese New Year