However, by this time, Japan was a confederation of local tribes without sophisticated iron weapons, while the Three Kingdoms of Korea were fully developed centralized powers with modern iron weapons and were already utilizing horses for warfare.
Men på dette tidspunkt var Japan en sammenslutning af lokale stammer uden avancerede jernvåben, mens de tre kongeriger Korea var fuldt udviklet centraliserede statsmagter med moderne jernvåben og allerede udnyttede heste til krigsførelse.