Hot Water is Cloudy White

Hi everyone, I have questions regarding hot water because I dont know whether this is normal or not.

So up til now whenever I want to drink I always use the cold water tap because whenever I turn on the hot water (either from the kitchen sink or the bathroom), the color is cloudy white? (FYI I live in Tokyo)

I noticed that it is from the hot water tap only because the cold one is crystal clear.

Also, one day I decided to pour it to a glass to see because I was so curious what this cloudy smoky white thing is, it turns out that after a while, the white thing disappear and the hot water becomes clear again. Questions are:

1. Since IDK what the white thing is, is this normal?
2. Do you guys drink water from the hot water tap?

Any help and answers would be appreciated