The Japanese take great pride in their design. Attached is a part of an article describing the design of the Tyros by their design engineer.

An Attractive silhouette at any angle.

The guiding principle behind our design was eliminating the barrier between the player and audience. Because performance keyboards are frequently used at house parties and in cafes, the player and audience are already in closer proximity than when the player is on a stage, which creates a relaxed, intimate feel. Rather than straight lines and flat planes, which can convey a sense of strength and sophistication, we chose to use seamless curves that flow from one side to the next to bring the performer and audience closer together. The result is a design with smooth surfaces and a sinuous silhouette, one where the hard edges have been ground away to show its inner spirit.
We used 3D software to draw the flowing lines and create a silhouette that looks good from any angle, combining numerous curves. We went through numerous rounds of cutting the 3D data on a plotter to see how a design looked in a mockup. Why did we go to so much trouble in the pursuit of this curved design? Because we believe that a professional tool should have a shape that looks good from any angle.

Montage Design:

Previous Yamaha keyboard and synthesizer designs tended to give a more static impression. For the MONTAGE, however, we felt that a dynamic style was necessary to allow the instrument could positively express the power and sound of on-stage performances. This design concept is most true for the back of the synth, which is the side that the audience directly sees. Here, the aluminum allows for a deep, concave surface that catches the stage lights and sets off the static Yamaha logo against a background of deep shadows.
Meanwhile, the control panel maintains Yamaha's logical design to ensure intuitive use. The layout of the knobs and sliders gives very direct access, while their concave shape provides a natural fit for your hands. In terms of functions, the highlight is the Super Knob, which changes colors at different compass points. Its luminance is carefully designed so that it still looks solid when powered off.
There is a photograph that was a particular inspiration for me when designing MONTAGE. The image depicts a huge, but empty, stadium with Keith Emerson focused intently on playing the GX-1. Soon to be buried in fans, the pressure of the gaping space behind Keith bears down on him, but the GX-1 never budges as he pushes it full throttle. This scene makes me think of the instrument and its player as a single unit. MONTAGE fuses with the artist on stage to feed the potential of both, and forges an awesome partnership.

Regards,

Jerryghr