An amazing Japanese Koi T-shirt with various writings on it, explaining the significance of this mystical creature in Japanese culture. Here are the Japanese-English translations: On the top right, it says (勇気: Yuuki) courage and bravery. Just below it, it says (肝試し) test of courage, for example. At the very left, it says (度胸を据える) to make up one’s mind and prepare oneself for what is to come. At the bottom, it says (勇気を出す) to summon courage and be brave.