Uki, Tsuyu, and Akisame: Rainy Season in Japan

Spanning from May to July, Tsuyu (梅雨), also called Baiu (梅雨), is a cloudy/rainy season broadly seen in East Asia, including the southern part of China, South Korea, Taiwan, and Japan.

Tsuyu (梅雨) and Uki (雨季)

Rainy Season in Japan

In Japan, almost all areas except for the northernmost island of Hokkaido experience that cloudy, rainy period.

Entering the season is called Tsuyuiri (梅雨入り) or Nyubai (入梅), which, based on the Japan Meteorological Agency, begins with the country’s southernmost prefecture Okinawa annually early in May.

On the other hand, finishing the season is Tsuyuake (梅雨明け), also known as Shutsubai (出梅), which ends in the northern Tohoku region annually around the end of July.

Ume Plums

One theory holds that the reason why Tsuyu (梅雨) includes the word Ume (梅) in its name is that the plum fruit ripens during the rainy period,

and as you can see from the other word Ame (雨), meaning rain, Tsuyu is an Uki (雨季).

Uki (雨季)

As Uki (雨季) means rainy season in Japanese, it represents long periods of rainfall, usually spanning over one month,

and the representatives in Japan are Tsuyu and the Autumn Rain Akisame (秋雨) seen from late August through around October.

(Reference Pages: Wikipedia 雨季, 梅雨, 秋雨 )


Hi, I'm Tomo, a Japanese blogger living in Niigata Prefecture, Japan. For the purpose of enriching your life, I would like to introduce things about Japan on this blog, especially unique Japanese products, cooking recipes, cultures, and facts and trivia.

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