Live answer
No, it is not snowing in Tokyo Station at the moment. It is 54°F, light drizzle. The camera above is live, so you can check for yourself.
About this snow cam
Tokyo Station, Tokyo, Japan, is at 35.68°N, a temperate latitude where snow is occasional and depends on the weather. This page shows a live camera with the current weather at its exact location, so you can see the conditions for yourself.
In a typical year, Tokyo Station gets most of its snow roughly December through February. That is a rough guide based on latitude alone, and nearby mountains, lakes or the sea can change it. The camera and the 24-hour snowfall on this page show what is happening today.
This camera looks out over Tokyo Station: streets, rooftops or the land around it, depending on where it points. The picture is live, not a recording.
Questions
No, it is not snowing in Tokyo Station at the moment. It is 54°F, light drizzle. The camera above is live, so you can check for yourself.
Usually roughly December through February, going by latitude. Snow outside that window does happen.
The snowing or not snowing label comes from the weather model at the camera's exact coordinates and is refreshed about every hour. The model can be wrong, which is why the live video is on the same page.
Yes. The live map shows every camera, and the Snowing now only filter shows just the ones where it is snowing.
Conditions here can change within an hour, so the camera may look different the next time you load it.