Japanese external relations in this historical period, the fourth century onward, included militaristic advances upon the Korean peninsula; this resulted in the subjugation of the Silla (an ancient Korean Kingdom) and Paekche (an ancient Korean Kingdom), and furious battles with Goguryeo (an ancient Korean Kingdom).
対外関係としては、4世紀以降朝鮮半島に進出し、新羅や百済を臣従させ、高句麗と激しく戦った。