Why does the whole country shut down over New Year — and what do all the special foods and decorations mean?
From December 31 to January 3, Japan goes quiet: businesses close, families gather, and a whole apparatus appears — big cleaning (ōsōji), pine-and-bamboo kadomatsu and rope shimekazari at doors, toshikoshi soba on New Year's Eve, lacquered boxes of osechi food, mochi, money envelopes (otoshidama) for kids, postcards (nengajō) delivered precisely on the 1st, and the first sunrise watched from beaches and mountaintops.
Oshōgatsu is Japan's biggest holiday: welcoming the toshigami — the year deity — into a purified home. Every custom is a piece of that: cleaning purifies the house, decorations mark it as ready to receive the god, and osechi is preserved food so that everyone, including the kitchen, gets to rest.
Why — five layers
The year boundary is the great purification moment: debts settled, houses cleaned, grudges ideally released. You don't carry the old year's dirt across the line.
It's the family holiday — the annual homecoming rivaled only by Obon. Nengajō maintain the year's weak ties in one batch; otoshidama channels intergenerational affection as crisp new bills.
Meiji Japan switched to the Gregorian calendar in 1873, moving shōgatsu to January 1 — unlike China or Korea, which kept lunar New Year. January 1–3 function as de facto national shutdown, anchored by holidays, special TV and the post office's nengajō machine.
International view
Think Christmas (family gathering) and New Year (calendar reset) fused into one holiday. Visitors from lunar-New-Year cultures are often surprised Japan celebrates on the solar date — a Meiji-era rationalization.
But not always
The customs are lightening: osechi is now mostly bought rather than made, nengajō numbers fall every year (LINE won), and more shops open on January 1 than a generation ago — konbini never closed to begin with.
What to do
Traveling over New Year: expect many restaurants and attractions closed Dec 31–Jan 3 (trains run; konbini and chains stay open), book accommodation early, and join hatsumōde at a shrine — it's the single most Japanese thing you can do on January 1.
Sources
- ethnographies of toshigami and New Year customs
- Meiji calendar reform (1873)