There are five bins standing against a wall in the laundry room of Matsumoto Yamaga's Karigane clubhouse. One each for turtlenecks, long-sleeved tops, track pants, short-sleeved tops and goalkeeping attire - pasted with a picture of each kit, which is provided to first-team players of the Japanese football team.

These innocuous bins sit in front of a board on which players' game statistics, including heart rate, total distance run and sprints made, are put up.