Warm air flowed over the Japanese archipelago this weekend, and temperatures rose in many places. In central Tokyo on the 15th the high reached 18.4°C—like early April—and the early-blooming Kawazu cherry trees in front of the Marubeni headquarters next to the Palaceside Building burst into flower.
On the 16th Tokyo was mostly cloudy under a trough and moist air; this week looks like a mix of sun and cloud. The 19th is Usui, one of the twenty-four solar terms, when snow turns to rain and ice melts to moisten the earth. It is a seasonal turning point with sharp swings in temperature, so take care not to fall ill.