What is the rainiest part of Japan?

The wettest place in Japan, and among the most rain-soaked destinations the world over, Yakushima is hit by at least 250mm (9.8 inches) of rain every month. In the summer typhoon season this number can triple. Annual rainfall readings reach up to 10 meters (390 inches).



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Annual precipitation averages between 1,000 and 2,500 mm (40 and 100 in) except for the areas such as Kii Peninsula and Yakushima Island which is Japan's wettest place with the annual precipitation is one of the world's highest at 4,000 to 10,000 mm.

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In Tokyo, “tsuyu” (??) - the rainy season - usually begins in mid-June and ends near the end of July. It rains at least a little almost every day, sometimes no more than a gentle drizzle, and sometimes quite a bit more.

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April. Besides autumn, April is often considered the best time to visit Japan because the cherry blossom are in bloom and the weather is pleasantly mild.

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Typhoon season generally lasts from May to October, although typhoons may occasionally occur outside of this time period. In the south of Japan, Okinawa tends to experience more typhoons than the mainland. Northern regions of Japan such as Hokkaido tend to experience fewer typhoons.

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The best time to visit Japan is between March and May and between September and November as it's both warm and dry between these periods. However, the joys of springtime and the iconic blooming of the cherry blossoms in Japan are no secret, which means you'll be sharing the space with plenty of other travelers.

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The rainy season starts in mid-June and last until mid to late-July over much of the country. In Okinawa its starts and finishes in mid-May and finishes in late June. Hokkaido does not experience a rainy season. Typhoons mostly occur in the autumn (fall) months.

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In Japan, January is considered the coldest month of the year. That means temperatures plunging below freezing in Honshu (Japan's main island — this is where Tokyo and Kyoto are located). Or at least reaching single digits (the 30s/40s Fahrenheit).

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But be careful what you wish for, as Japan stands poised to over-deliver some much-needed moisture in the next few weeks with the start of what the locals commonly refer to as “Tsuyu” - the Japanese rainy season. In 2023, Tokyo's rainy season arrived on June 8 and finished around July 22.

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Okayama is known as the “Land of Sunshine,” as it has the highest number of clear days and the highest number of days with rainfall of less than 1 mm in the whole of Japan.

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