Japan currently doesn't have this in the more normal sense. That Japan is still super high-tech is more of a PR move. I literally had to send a fax to get my current internet (though it is fiber-to-the-home).

Where Japan is innovating is in robots and also its crossovers with an aging population. Possibly also some space stuff.

But for an everyday person, I don't really see anything that doesn't already exist somewhere else. I was raised in the US and have been living in Japan most of the last 10 years.