Japan Koki Ogawa 19 Home Soccer Jersey World Cup 2026Description Official Japanese football jerseys with player name badges. The Japanese wear their blue jerseys nicknamed "Samarai Blue" out of superstition. In the past. they wore white home jerseys. the color of which was derived from the national flag. However. after poor performances at the 1990 World Cup in Italy and the 1992 Olympics. it was decided to switch to the blue jerseys that they wore at their first major international competitive match