It has been my experience both from my upbringing and my short return that things like power outages and utility interruptions are far more common in the U.S. than in Japan. Part of the issue is that the lines often cover more space and are underground due to the widespread nature of homes and services. Another, in my opinion, is that Americans are less diligent about maintaining such things. In Japan, the utilities companies react relatively quickly to small problems, and, on the rare occasion that there is a disruption, you are smartly informed both of the moment it goes off and the moment it goes back on.
In 23 years of living in Tokyo, power flickered briefly a couple of times, but never went off for any length of time and water was only ever stopped when I had a question about the cost of my bill and they needed to check for leaks. The utilities there were incredibly reliable and I miss that.