Tropical storm Jongdari is moving southward off Kyushu island in southwestern Japan.
The Meteorological Agency says the storm was 70 kilometers west of Yakushima Island in Kagoshima Prefecture as of noon on Monday. It was traveling southward at 20 kilometers per hour.
Jongdari has a central atmospheric pressure of 994 hectopascals and is packing winds of 55 kilometers per hour near its center.
Heavy rain and strong winds are likely to continue in the Shikoku and Kyushu regions as the storm is expected to slow down and linger off Kyushu for some time.
Weather officials say parts of Shikoku and southern Kyushu may see more than 50 millimeters of rainfall an hour. They are predicting 150 to 250 millimeters for those areas in the 24-hour period through noon on Tuesday.
They are urging people to be prepared for landslides, overflowing rivers, floods in low-lying areas, high waves and storm surges.