For over 15 centuries, the relationship between Japan and Korea was characterized by cultural exchanges, economic trade, political contact and military confrontations, all of which underlie their relations even today. During the ancient era, exchanges of cultures and ideas between Japan and mainland Asia were common through migration via the Korean Peninsula, and diplomatic contact and trade between the two.

Anti-Korean sentiment in Japan refers to opposition, hostility, hatred, distrust, fear, and general dislike of Korean people or culture in Japan. Relations between Japan and Korea can date back to nearly two millennia, mostly defined through cultural exchanges and diplomatic trade. However, major events involving military aggression and political disputes play a key factor in harboring negative sentiment. Much of the current anti-Korean sentiment stems from conservative politicians and far-right groups.