Som Rai comments

I am writing this on the basis of my own study. At the time when Wuhan suffered from a high rise in corona virus cases the temperature was around 10 degree Celsius. And the cases started to drop down when the temperature got warmer around 17 - 18 degree Celsius. And currently if you look a the temperature of Europe mainly Spain and Italy the temperature is below 10 degree Celsius and the rise in the case has remarkably topped China. Which means, the virus is much active and is easier to spread around the temperature below 10 degree Celsius. I was expecting for the rise in cases in Japan after the snow fall and It happened. Stay at home and Be Safe people.

There might be other major consequences if Japan goes into lock down. Around 20,000 to 40,000 Japanese people suicide every year. And as a result of lock down there might be economic crisis which may lead to more number of deaths from suicide than the corona virus.