Heavy rain continued to pummel some of the northern part of Okinawa's main island on Sunday.
The Meteorological Agency urged people in the affected region to be on high alert for landslides, inundation of low-lying areas and swollen rivers.
In the northern part of the main island, rainfall is expected to reach up to 180 millimeters in the 24 hours until noon Monday, according to the agency.
Heavy rain mainly hit the city of Nago and the villages of Kunigami, Higashi and Ogimi.
In Higashi, 48-hour rainfall until 11 a.m. Sunday totaled 637.5 millimeters, a record high for the area.
For some areas of Ogimi, the highest-level warning on the country's five-tier disaster alert system was issued temporarily.
While many parts of Japan are covered by a high pressure system, warm and humid air flew into Okinawa's main island and the Amami region of Kagoshima Prefecture, southwestern Japan, from the east and southeast due to a typhoon over the sea east of the Philippines, according to the agency.
Between the small hours and afternoon of Saturday, a heavy rain emergency warning was issued to the island town of Yoron in Kagoshima.
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