TOKYO, June 25 (Xinhua) -- A tropical low pressure system, along with a stationary front over the Sea of Japan, are causing unstable weather across much of the country, leading to heavy rain and thunderstorms.

On Wednesday, some areas saw intense rainfall, with up to 389 mm in 24 hours in Ogaki City, Gifu Prefecture.

The unstable weather is expected to continue through Thursday, with more heavy rain, lightning, and strong winds likely, according to the Japan Meteorological Agency.

Forecasts predict up to 100 mm of rain in the Kanto-Koshin, Tokai, and Kinki regions, and 80 mm in Tohoku and Chugoku regions.

The Japan Meteorological Agency warns of possible flooding, landslides, and rising rivers, urging people to watch for signs of storms and move to safe buildings if needed. ■