What's on in Karuizawa, Japan through the year
Karuizawa, Japan has 6 curated events through the year — 1 natural spectacle, 1 holiday, 3 seasons and 1 seasonal opening. The ones to plan around: Autumn colour (October) and First lifts in Japan (November). July to August are its peak-crowd months.
Updated September 2026 · every event curated and sourced · dates for 2026 where they are announced, the usual window where they are not
Karuizawa events and crowds by month
January in Karuizawa
Karuizawa weather in January →Busy — Winter break (fuyuyasumi) in Japan, school holidays in 5 of the markets that fill it
- Season
Deep winter quiet
10 Jan – 28 FebOff-season shutdownClosuresA good share of the summer-house restaurants and galleries shut after New Year and do not reopen until Golden Week. Cold, dry, clear, and largely closed.
Still on: First lifts in Japan (1 Nov – 31 Mar)
February in Karuizawa
Karuizawa weather in February →Quiet — school holidays in 2 of the markets that fill it, one of its worst months for weather
Nothing new starts in February.
Still on: Deep winter quiet (10 Jan – 28 Feb), First lifts in Japan (1 Nov – 31 Mar)
March in Karuizawa
Karuizawa weather in March →Busy — Spring break (haruyasumi) in Japan
Nothing new starts in March.
Still on: First lifts in Japan (1 Nov – 31 Mar)
April in Karuizawa
Karuizawa weather in April →Busy — Spring break (haruyasumi) in Japan, school holidays in 2 of the markets that fill it
Nothing new starts in April.
May in Karuizawa
Karuizawa weather in May →Busy — Golden Week in Japan
Nothing new starts in May.
June in Karuizawa
Karuizawa weather in June →Busy — school holidays in 3 of the markets that fill it, one of its best months for weather
- Season
Tsuyu and the fog
10 Jun – 15 Jul · usuallyMonsoonAt a thousand metres the rainy season is cloud sitting in the larches rather than downpours. The shops are quiet and the moss is why people who know come now.
July in Karuizawa
Karuizawa weather in July →Peak crowds — Summer season, Summer break (natsuyasumi) in Japan
- Season
Summer season
15 Jul – 31 AugCrowdedBook earlyTokyo's hot-weather escape since the 1880s, and the population multiplies for six weeks. Restaurants need booking, the outlet mall is full, and the expressway backs up on Friday evenings.
Still on: Tsuyu and the fog (10 Jun – 15 Jul (usually))
August in Karuizawa
Karuizawa weather in August →Peak crowds — Summer season, Obon
- Holiday
Obon
13–16 AugNational holidayCrowdedThe peak of the peak. Second homes are all occupied, the bicycle lanes are busy, and a table anywhere decent needs to have been booked in spring. Source ↗
Still on: Summer season (15 Jul – 31 Aug)
September in Karuizawa
Karuizawa weather in September →Busy — school holidays in 3 of the markets that fill it, one of its best months for weather
Nothing new starts in September.
October in Karuizawa
Karuizawa weather in October →Shoulder season — school holidays in 3 of the markets that fill it, an ordinary month
- Nature
Autumn colour
15 Oct – 10 Nov · usuallyThe larch avenues and Kumoba pond turn from the end of October. The town is at its best and the day-trippers thin out after the first hard frost.
November in Karuizawa
Karuizawa weather in November →Shoulder season — an ordinary month
- Opening
First lifts in Japan
1 Nov – 31 MarSki seasonThe Prince resort makes snow in cold, dry air and usually opens on 1 November, weeks before anywhere else in Nagano has any. Short, groomed runs and a Tokyo day-trip crowd. Source ↗
Still on: Autumn colour (15 Oct – 10 Nov (usually))
December in Karuizawa
Karuizawa weather in December →Busy — Winter break (fuyuyasumi) in Japan, school holidays in 4 of the markets that fill it
Nothing new starts in December.
Still on: First lifts in Japan (1 Nov – 31 Mar)