Navigating the rainy season in Japan: Tsuyu Guide

In a country celebrating four different seasons, Japan added a fifth, lesser-known season in spring and summer: Tsuyu,rainy season. For travelers planning a visit from May to July, understanding this meteorological phenomenon can make a difference between days of continuous rain and memorable experiences full of seasonal charm.

Tsuyu may present a challenge for travelers, but it also reveals the Japanese side that many tourists miss. From emerald green landscapes to unique seasonal traditions, Japan’s rainy season offers authentic experiences and memories, far beyond typical travel itineraries. With proper preparation and flexibility, you may find yourself embracing Tsuyu.

Introduction to Tsuyu: Japan’s rainy season

What is Tsuyu?

Tsuyu transformed into “Plum Rain” and obtained a poetic name because it matches the maturity of Japanese plums. Unlike the soft spring showers in April, Tsuyu brings a more lasting rainfall pattern and well-known high humidity that covers most of the Japanese archipelago.

This unique weather pattern is characterized by prolonged rainfall and high humidity that affects most of the country, except Hokkaido. Although it usually doesn’t rain all day, every day, you can expect frequent showers and wet conditions.

Why Japan experiences rainy season

The rainy season in Japan is caused by seasonal atmospheric phenomena, where the Pacific Ocean is warm, humid and air collides with the cooler continental air mass. This creates a fixed front that hovers over Japan, triggering weeks of intermittent rainfall as the entire country gradually moves northward.

Unlike the monsoon in Southeast Asia, Japan’s Tsuyu is usually lighter, with sunlight spreading between rainy days. This meteorological model brings ideal conditions for lush vegetation and is crucial for Japanese agriculture, especially rice cultivation.

Hakang Shrine

Japan rainy season schedule

One of the most important things about Tsuyu is that it does not arrive in Japan at the same time. The onset and end of Tsuyu are significantly different, depending on the geographical location. Usually, the rainy season moves from south to north.

Southern Japan: Okinawa, Kyushu and Shikoku (May to July)

As the southernmost prefecture in Japan, Okinawa And Kyushu kagoshima – At least its southern Amami Islands – It is the first person to experience Tsuyu, usually starting in mid-May and continuing until late June. While you will encounter rain, it is usually in the form of sudden showers rather than continuous downpours, and warmth can still enjoy some activities.

The rest South of Kyushu Typically, the rainy season starts from late May to early June, usually earlier than other parts of the rest of Japan’s mainland and ends in mid-July.

Shikoku From early June to mid-July, rainy season is usually experienced.

Southern and Central Hensu: Chugoku, Chubu, Kansas, Kanto (June to July)

For most travelers visiting major Japanese cities, the rainy season will arrive in early June and extend into mid-July.

Chugoku (Xi Hong): The Chugoku area usually experiences Tsuyu from early June to mid-July.

Kansai (including Osaka, Kyoto, Nara): Similar to Chugoku, the rainy season in the Kansai area usually spans from early June to mid-July.

Canto (including Tokyo): Tokyo and the wider Kanto region usually enter Kuyu in early June, with the season ending in mid-July. While it may feel wet and wet, long sunny days (called tsuyu no Nakayasumi) are also common.

Especially in Tokyo, the rainy season brings different rhythms to the city. While morning commutes may be accompanied by drizzles, the afternoon can be accidentally cleared, providing a chance to visit.

Tohoku (June to August)

The rainy season later reaches the Northeast, usually starting in late June and sometimes extending to late July and even early August, although it may not be as strong as the South.

Hokkaido (Exception)

It is worth noting that Hokkaido Island, the northernmost part of Japan, did not experience the unique Suyu rainy season. While there are still rainy days, it avoids long-term wet conditions in other parts of the country. This makes Hokkaido a popular escape for those who want to avoid humidity in June and July.

What to expect in tsuyu

Understanding Tsuyu’s actual feelings can help travelers prepare mentally and physically for their visit.

Weather pattern and typical conditions

humidity: You can expect high humidity in most parts of Japan, and even in the non-Lyn era, the air will become viscous and heavy.

temperature: The temperature can be warm, usually in the range of 22–30 degrees Celsius (72-86 degrees Fahrenheit).

rainfall: The rain will vary from rain to heavy downpour. It is not uncommon for a few days, but it rarely rains all day. There is usually a break in the rain.

typhoon: Although the main season for typhoons is from July to October, fewer than typhoons occasionally occur in southern Japan starting from June.

An unexpected sunny day break (Tsuyu no Nakayasumi)

One of Tsuyu’s silver linings is a phenomenon known as “Tsuyu no Nakayasumi” or “rainy season interruption”. These periods last for several days to more than a week, and the high-pressure system temporarily pushes the rain away, resulting in clear, sunny days.

These breaks are unpredictable, but are popular with locals and tourists. They offer opportunities to enjoy outdoor activities and sightseeing without having to keep an eye on rainfall.

Strong humidity

For many tourists, especially those from drier climates, the humidity during Tsuyu is more challenging than the rain itself. The air feels heavy and sticky, and even a short walk may sweat. Humidity can also affect energy levels and appetite, so don’t be surprised if you feel a little sluggish or like to eat. But please keep eating and drinking – Avoid stroke.

Indoors, you sometimes encounter powerful air conditioning in public spaces, creating a huge temperature difference between indoor and outdoor environments. This makes stratification crucial even in warmer seasons.

Kenny Temple in Kyoto

Make full use of the rainy season in Japan

Don’t let the rain stop you! Tsuyu offers a unique perspective on Japan, lush greenery, fewer crowds of popular attractions, and vibrant blooms of hydrangeas.

Basic packaging and preparation tips

Compact umbrella: High-quality, windproof compact umbrellas are essential and can be easily purchased at a convenience store in Japan (Conbini) for around 500 to 800 yen.

Waterproof footwear: Waterproof sneakers or stylish rubber flats are highly recommended. Avoid heavy-duty fabrics such as denim or suede.

Lightweight raincoat or poncho: A breathable, fast-drying raincoat or poncho is priceless.

Quickly dry clothes: Synthetic, hygroscopic fabrics are your friends. Layers are key, as indoor air conditioners can be strong.

Mini towels and small waterproof bags: These small and powerful items are essential to eliminate moisture and protect electronics.

Rainy season attractions and activities

Japan offers many ways to enjoy the rainy season:

• Museum Jump: Deep into the world-class museum in Tokyo, the perfect indoor shelter on rainy days.
• Onsen: Taste the magical tranquility soaked in the hot spring while listening to the rain outside.
• Depachika Food Hall: Explore the department store’s basement food floor to prevent elements from taking culinary adventures.
• Traditional teahouse: Experience the tranquility of Japanese tea rituals as raindrops create natural music on the roof of the temple.

You can also check out our selected guide The best indoor activities in Tokyo on rainy days.

Seasonal Features: Hydrangea and beyond

Tsuyu’s silver lining is undoubtedly a spectacular flower of hydrangea (ajisai) During this season, paint Japan with shades of blue, purple and pink. These flowers thrive in wet conditions, creating amazing displays in gardens and temples across the country.

Check out our extensive guide The best hydrangea spots in Japan and The best hydrangea spots across Tokyo.

Apart from flowers, Tsuyu brings seasonal foods such as melons, the season’s Japanese plums of the same name (in this case “ume” pronounced “ume” instead of primitive consumption, but processed into Umeboshi, Umeshu, umeshu and other slightly sour yet truly delicious dishes), as well as the first harvest of Sweetfish (Ayu).

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