Compounds of 一国一城

• 一国一城
  (n) (1) (possession of) one feudal domain and one castle
  being independent (acting without compromise or assistance)
  (2) establishing only one castle in each feudal domain (edict issued by the shogunate in 1615)
• 一国一城の主
  (n) feudal lord
  head of a household
  proudly independent person