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The only month with no national holiday — and the one when the air visibly changes. Tsuyu rolls in, hydrangeas bloom on the days the rain is heaviest, and the country quietly starts pickling plums in three-liter jars on kitchen counters.
June 2026
Dates for 2026
June 7
Early-mid June · Nature
The Meteorological Agency declares the start of the rainy season region by region, usually working from Kyushu in early June up to Tohoku by mid-month. "Tsuyu" literally means "plum rain" — the rain comes as the plum fruit is ripening. Forecast accuracy is hit-and-miss; the umbrella-on-every-arm visual is reliable.
Early-mid June · Nature
The Meteorological Agency declares the start of the rainy season region by region, usually working from Kyushu in early June up to Tohoku by mid-month. "Tsuyu" literally means "plum rain" — the rain comes as the plum fruit is ripening. Forecast accuracy is hit-and-miss; the umbrella-on-every-arm visual is reliable.
Mid-late June · Nature
Hydrangea is the unofficial flower of the rainy season — soil pH controls the color (acidic = blue, alkaline = pink), so the same garden can have both. Meigetsuin in Kamakura and Hakusan Shrine in Tokyo are the named viewing spots. The shot people are after is the flower wet, ideally with a snail on a leaf.
Mid-late June · Nature
Genji-botaru, the larger species, glow for about two weeks in late June, in clean-water valleys outside major cities. The viewing protocol is strict: no flashlights, no flash photography, no loud voices — fireflies stop signaling when disturbed. Local conservation groups usually publish the year's peak dates a few days out.