This is a nice shirt, but Japan play in blue for the home kit, blue comes from the old uniforms of the Japanese navy, and they used a blue kit in the 1936 olympics, and decided to keep it blue.
Well, you can be imaginative with the blue jersey, and to be honest, this does not look that imaginative, just a white jersey with a red middle band.
You could have done so much with the traditional blue shirt - take inspiration from traditional Japanese Clothing, Art, patterns, to create something original.
Its a nice shirt, but you should have made it the away.