Tropical Storm Nari made landfall in the southern part of Mie Prefecture at around 7 a.m. Saturday.
As of 9 a.m., the sixth named storm this year was traveling north-northeast near the city of Tsu, in Mie, at a speed of 20 kph, according to the Meteorological Agency.
The atmospheric pressure at the center of the storm stood at 1,000 hectopascals, with a maximum sustained wind speed of 18 meters per second and a maximum instantaneous wind speed of 25 meters per second.
The city of Wakayama recorded rainfall of 47.5 millimeters in an hour through to 9:05 a.m. A maximum instantaneous wind speed of 25 meters per second was registered at the cape of Shionomisaki in Kushimoto, Wakayama Prefecture, at around 5:20 a.m.
The storm, which was downgraded to a tropical depression at around 3 p.m., was projected to travel across the Tokai central region before reaching the seas east of the Kanto region by Sunday morning.
The agency warned residents in the Tokai and Kanto-Koshinetsu regions to be on high alert for heavy rain.