Here's Jamie Cullum performing for the workers at Yamaha's piano manufacturing plant - we're assuming it's the one at Kakegawa near Shizuoka - on a recent trip to Japan. While there he also made a film about the philosophy behind Yamaha's process of piano manufacture. A quote from Jamie in the press release reads as follows:
"The visit to the Yamaha factories made me appreciate that the people who produce these instruments for the artists are artists themselves. I'm sure there aren't many pianists who really appreciate the intensity of the processes involved in building a grand piano from raw materials and bringing it to the stage or shop. I'm delighted that the videos depict this with such beauty and passion."