Tsuyu: Hydrangeas and the Beauty of Japan's Rainy Season

Tell someone you’re visiting Japan in June and watch them wince: that’s the rainy season. And it’s true — you’ll get wet. But here’s what the wincers miss. For a few weeks each summer the crowds thin out, the hotel prices drop, the moss gardens blaze, and the country’s most famous temples stand half-empty under a soft grey sky. Tsuyu isn’t the season to endure. It’s the season the locals quietly keep for themselves.

What tsuyu actually is

Tsuyu (literally “plum rain,” for the plums ripening as it arrives) is a roughly month-long rainy spell that creeps north across most of Japan from early June into July. It’s not a monsoon — think humid, changeable days with stretches of drizzle, the occasional heavy burst, and surprising windows of sun.

A few things worth knowing:

Hokkaido escapes it almost entirely. The far north has no real rainy season, so it’s your bolt-hole if you want to dodge the wet completely.
It’s warm rain, not cold. Pack for humidity, not chill — light, quick-drying layers beat a heavy coat.
Mornings and afternoons differ. A grey dawn often clears by midday, so stay flexible rather than writing off a whole day.

Kamakura, capital of the hydrangea

The flower that owns this season is the hydrangea — ajisai — and nowhere wears it better than Kamakura, an hour south of Tokyo on the JR Yokosuka Line.

Meigetsu-in, in Kita-Kamakura, is known simply as the Ajisai-dera — “hydrangea temple.” Its roughly 2,500 plants are almost all “Hime Ajisai,” a variety that turns a deep, uniform blue, so by mid-June the entire temple seems to float in a single colour. June hours run about 8:30am–5:00pm, entry is ¥500, and there’s a catch worth planning for: to shoot the famous flower-lined stone steps without a wall of umbrellas in frame, you need to be in line by 8:15am.
Hase-dera, a short hop south near Hase Station on the toy-like Enoden line, plays the opposite note: 40-plus varieties tumbling down a hillside path with the Pacific glittering behind them. On peak days the Ajisai Path runs on numbered tickets, so check the board when you arrive.

String the two together with the wooded walk through Kita-Kamakura between them, and you’ve got a flawless rainy-day itinerary.

Beyond Kamakura

The hydrangea trail runs the length of the country (bloom windows are on our seasonal calendar):

Mimuroto-ji in Uji, just outside Kyoto, banks thousands of hydrangeas across a hillside garden and lights up a single “heart-shaped” bloom that has become an early-summer pilgrimage for photographers.
The Hakone Tozan Railway earns its nickname as the ajisai densha — “hydrangea train” — when the flowers press in on both sides of the mountain track from mid-June into early July, lit for special evening runs.
The blooms even keep a secret diary of the soil: acidic ground turns them blue, alkaline turns them pink, so one garden can hold a whole spectrum.

Making the most of a wet trip

The rain rewards a change of plan, not a fight against it:

Lean into indoor Japan. This is the season for museums, covered arcades, depachika food halls, long café afternoons and the country’s world-class aquariums.
Carry a clear plastic umbrella. Sold at every convenience store for pocket change, they’re the unofficial uniform of tsuyu and far handier than a travel umbrella.
Waterproof your feet, not just your jacket. Wet shoes wreck a day faster than a wet head — quick-drying footwear earns its place on temple gravel.
Pair every outdoor plan with an indoor one and choose based on the morning sky.

Why the rain is worth it

There’s a mood to tsuyu the brochure months simply can’t sell. Moss gardens glow, valleys steam, the great temples empty out, and the whole country softens behind the rain. Sit on the veranda at Meigetsu-in with water ticking off the eaves and a sea of blue below you, and you’ll understand why Japanese poets keep coming back to this season. Autumn’s golden days are easier, sure. But tsuyu offers something rarer — a quieter, greener, more contemplative Japan, available to anyone willing to carry an umbrella.

Good to know

When is Japan’s rainy season?

Roughly early June to mid-July across most of the country, arriving in Okinawa in May and creeping north from there. Hokkaido has no real rainy season at all — it’s the escape hatch if you want to skip the wet entirely.

Is June a bad time to visit Japan?

It’s an underrated one. You trade some drizzle for thinner crowds, lower hotel prices, glowing moss gardens and the year’s hydrangea show — and grey mornings often clear by midday. Pack quick-drying layers and keep plans flexible rather than cancelling them.

Where is the best hydrangea viewing?

Kamakura is the capital: Meigetsu-in’s sea of uniform blue (be in line by 8:15am for the famous steps) and Hase-dera’s forty-plus varieties above the Pacific. Beyond it, Mimuroto-ji near Kyoto and the Hakone Tozan “hydrangea train” both peak from mid-June into early July.

What comes right after tsuyu?

The rain lifts into high summer almost overnight — which means festival and fireworks season starts just as the umbrellas go away. July’s Gion Matsuri in Kyoto overlaps the season’s tail end.