A Japanese government survey shows that the country's exports declined 19.2 percent in July from a year earlier.
The Finance Ministry released the preliminary trade data on Wednesday.
Local rafting guides are delivering relief supplies to downpour-hit communities in Japan's southwestern prefecture of Kumamoto. Access has been difficult because of flood damage to roads and bridges.
The guides used three vans to carry water, food, rubber boots, and other goods to three evacuation shelters and two community centers in Kuma Village.