Why does the weather forecast in Japan always say "sunny"?

When China broadcasts the weather forecast, it will say, "There will be heavy rain tomorrow."

And Japanese broadcasters will say "there may be a heavy rain tomorrow", sometimes it is a probability or something.

It's just a different way of broadcasting, nothing.

This is a custom in China, because everyone knows that the weather is changeable.

So let's just say one result.

Japan just prefers to add those words "probably, maybe"

These are practices.

Just like what foreigners should write on the knife when they buy it, such as "it can't be used to cut people"