Held every 5 years, the International Fryderyk Chopin Piano Competition attracts the world's top young pianists vying fiercely for a chance at stardom. But for the 4 piano manufacturers who supply instruments for the contest, the event also provides a supreme opportunity for public exposure. How many pianists will select their piano to play? What instrument will the winner use? In the latest competition held in the autumn of 2015, the fates of the instrument makers rested with company piano tuners who were nearly all Japanese.