William The Japan Meteorological Agency has a useful site with life info regarding rainfall and other bits of info useful during rainy season - in English! Click on “Heavy Rain, Typhoon,” then the “Extra Detail” button on the rain box. Scrolling will magnify/demagnify the area. Clicking the play button on the console will display the previous three hours of rain movement and prognosis for the next hour. Other gizmos on the tool bar are fun for weather nerds.