Introduction When you become a J-League fan, you will often see unique slang on Japanese social media and online forums. Learning these words helps you understand Japanese articles and posts much better. In this article, we introduce one of the most famous J-League slang terms: “Kainin-Boost” (解任ブースト), pronounced kah-ee-nin boo-suto. What Is “Kainin-Boost”? Let’s break … Continue reading J.League Unique Football Slang Explained(02): “Kainin-Boost”?