New Year is THE big thing in Japan. In the last days of the year, it is time for a deep cleaning in the house, declutter, make everything clean and beautiful to initiate a clean new cycle of life.
in the last 3 days, a lot of time is allocated to prepare special end of the year dishes, Osechi, that you eat cold on december 31. You may order them in advance in gourmet food shops and hotel restaurants at crazy prices.
from January 1 to 3rd, all Japanese must go and pray at the shrine or temple for a healthy and prosperous year – https://youtu.be/1k9Oz4rb0JI
dont expect big ceremonies, full restaurants and party time on december 31 in Japan, most places are closed, it is very quiet!!