What Is Japan’s Rainy Season? How to Travel Smart This Time of Year

Japan is now entering its rainy season, known locally as Tsuyu—a time of frequent showers and lush greenery.
It typically begins in late May in the south, moving northward to reach Tokyo in early to mid-June, and continues until mid-July. Only Hokkaido escapes this season entirely.

The rainy season used to bring gentle, steady rain, but in recent years, there’s been a rise in sudden downpours and flash floods.
Keep an eye on the weather forecast and remain flexible with your travel plans.

Despite the wet weather, this season has its quiet charm. Hydrangeas (ajisai) bloom beautifully in early summer, especially in scenic spots like Kamakura, Hakone, and Kyoto.
These flowers love the rain and make for fantastic photos even on cloudy days.

🚄 Shinkansen Tips During the Rainy Season

Japan's trains are famously punctual—even in the rain—but here are some important points:

• Shinkansen (bullet trains) usually run on time, even during rainy weather.

• In extreme weather, delays or cancellations may happen, especially on local or mountain lines.

• In recent years, Shinkansen services may be suspended in advance (planned suspension) if severe weather is expected the next day.

• You can also follow our @Shinkansen_Tix on Twitter for useful updates on Shinkansen operations and travel info in English.

• If your reserved train is canceled or heavily delayed, you can bring your ticket to the station counter for a full refund on the spot.

Even if your route is affected, Japan’s transport staff is helpful and quick to assist with changes or refunds.

With a raincoat, water-resistant shoes, and a flexible mindset, Tsuyu can be a rewarding season to explore Japan. It’s a time when nature is lush, the crowds are smaller, and beauty often hides behind the drizzle.