Good point. The Topaz Championship is a test/tournament held when a samurai in training is ready to demonstrate his skill. It includes tests of knowledge, athleticism, and martial skill, and all who compete must do well enough to be deemed samurai. In addition, the one who performs the best is named Topaz Champion, which is a great honor.
Players would be competing, though I would allow a small number of players to play evaluators (if a co-GM wished such a role).