Japanese rainy season.

Japane is a rainy season(east asian rainy season) now.

(except Hokkaido)

Japanese people called rainy season "tsu yu (梅雨)"　

The rainy season starts in the first ten days of June,
and continues until the end of July.
(almost 40 days or more)

It will rain(or cloudy weather) 4days or more in one week.
It is very sultry. Uncomfortable season.

If you will come to Japan in this season, don't forget umbrella.

But rain falling at this season is very important to the growth of grain.
Japan is a country of rice.

Only beautiful hydrangea(ajisai) improves our feelings.