Yamaha YUS1 upright pianoIntroducing the Yamaha YUS1 Upright Piano Produced in limited numbers and built on the same frame as the Yamaha U1, the Yamaha YUS1 upright piano takes the U1's refinement and playability to the next level. The YUS1 is semi handcrafted in the same part of the factory that builds the CF series concert grands, from specially selected materials including hammers from the range topping SU7 upright, and hand spun bass strings. The YUS1 is the most refined