According to the Japan Meteorological Agency (JMA), Namtheun made landfall at 1 a.m., and was moving in a northward direction at a relatively slow speed of 15 km per hour, meaning that the effects brought on by the storm will be protracted, Xinhua news agency reported.
The JMA said that Namtheum has a central atmospheric pressure of 1,002 hectopascals with the storm logging wind speeds of between 64 and 72 metres per hour near its centre and through a radius of 70 km from the centre of the storm.
The weather agency said the typhoon would likely shift and chart an easterly trajectory, but as much as 150 mm of rain were expected through the next 24 hours.
Japan's Kansai region, including Osaka, is forecast to receive around 180 mm of rain and in Hiroshima and nearby regions, the weather agency has warned that rainfall could total 120 mm.
