Not to worry, we have a two ocean, cutting edge, Navy with nothing to do. China has a brown water navy that can't even display its presence beyond 70 miles of its coast. Hell, every time they launch a submarine it sinks. Shoosh. The Imperial Japanese Navy it ain't. China is a threat only if you view a Napoleonic land march a threat.
"The Imperial Japanese Navy it ain't"
It aint even the Japanese MAritime Self Defense Forces of today. Those puppies could whup the so called PLA (navy)'s butt any day of the week, with one hand tied behind their back.
It didn't take long for the Japanese to go from wooden junks to the Imperial Navy. What makes you so confident that the Chinese navy will always be at its present state? That's kind of foolhardy, don't you think? The Chinese aren't exactly landlubbers considering half their population live near the coast and nor are they insular considering that there are Chinese everywhere in the world. FYI, they are creating a blue-water navy as we speak. They just recently announced their decision to pursue a carrier group.