South Korea may be slow to follow Japan's example in supporting countries seeking to assert their maritime rights in the South China Sea against China's expanding presence. Though the waters off the southeast Chinese coast are a vital trade route for South Korea, as they are for other surrounding countries, committing military force there would risk hurting the country's close trade relationship with China. That is a risk South Korea may not be ready to take, especially since it would mean throwing its lot in with its historical colonizer, Japan....