Japan in December: what to expect

December splits Japan in two. The Pacific side of Honshū — Tokyo, Kyoto, Osaka, Hiroshima — turns cold, dry and often sunny, with crisp blue skies and little rain. The Sea of Japan side — Kanazawa, Niigata, Akita — gets grey skies and heavy snow. Hokkaidō and the Japan Alps are in full winter, with reliable snow from mid-December.

Expect short days. Sunset in Tokyo falls around 16:30, so plan indoor or lit-up sights for the late afternoon and keep outdoor days compact. Mornings are the coldest part; layers you can remove by midday work better than one heavy coat.

December is a medium month for both crowds and prices. Early and mid-December are among the calmer weeks of the year in Kyoto and Tokyo: autumn-leaf crowds have gone and the New Year rush has not started. Hotel rates in the big cities are moderate by Japanese standards, and you can often book a week or two ahead.

Everything changes from 29 December. The New Year holiday (Shōgatsu) runs 29 December – 3 January: shops, museums and many restaurants close, shrines are packed on 1–3 January, and trains are full on 29–30 December and 2–3 January. If your trip overlaps that window, reserve Shinkansen seats and any New Year meals before you fly.

The month's biggest event is the New Year itself. From 29 December the country shifts into holiday mode, and on 1–3 January millions visit shrines for hatsumōde, the first prayer of the year. Meiji Jingū in Tokyo and Fushimi Inari in Kyoto are busiest at midnight and through the first three days.

Before that, winter illuminations run through the month in most cities, and ski resorts in Hokkaidō and Nagano open from mid-December as snow builds. Christmas itself is a commercial, couples-and-friends occasion rather than a public holiday — restaurants take bookings, shops stay open, and 25 December is a normal working day.

For a first trip, keep to the Pacific side: Tokyo, Kyoto, Osaka and Hiroshima are cold but clear, and the lack of rain makes temple- and museum-hopping easy. Tokyo's illuminations and New Year shrine visits fill the evenings; Kyoto is quieter than in November and its temples are far less crowded.

Skiers should head to Hokkaidō — Niseko and Sapporo — or to the Japan Alps around Hakuba and Nagano, where December snow is dependable. Sapporo also works as a city break with snow on the ground. Okinawa is the odd one out: mild but windy and wet, and better saved for spring.

Pack for dry cold, not wet cold: a warm mid-layer, a windproof outer shell, gloves, a hat and a scarf. Japanese buildings are well heated, so you will shed layers indoors. Comfortable waterproof shoes matter more in Sapporo than in Tokyo, where pavements are usually dry.

Add a small umbrella or hood for the Sea of Japan side, a power bank for long sightseeing days with early sunset, and coins or an IC card for trains and lockers. If you ski, rent bulky gear in resort rather than flying with it.

November is the autumn-leaf peak: better weather than December but the year's highest hotel prices in Kyoto and Tokyo. January is colder and cheaper, with low crowds after 3 January and the best snow of the season. February stays cheap in the cities, with Sapporo the exception during its Snow Festival.