Russian nuclear-capable bombers fly near Japan, US officials say. Is it a message for the US or for Japan?

Russia does this shit to all it's neighbors all the time. about monthly europeans intercept and escort out russian aircraft from their vectors. They are just testing response times and not giving a fuck http://www.foxnews.com/politics/2015/07/06/officials-us-jets-scramble-to-intercept-russian-bombers-off-california-alaska.html