Of course, not to spoil the joke, "Kagemusha" is not only the title of a famous movie by Akira Kurosawa, but it means "Shadow Warrior" in Japanese.
So I expect this backlit keyboard is aimed at gamers.
Looking up the keyboard, thanks to Google Translate, I find that, no, there is no fear of embarassment, though, that the keyboard really used good mechanical switches:
"Blue LED illumination built-in keyboard! Membrane switch + light typing feel achieved by adopting Surimukitoppu!" - and the keyboard is made by a company called Scythe.
A further web search found that "Irumineshonkitoppu" referred to the transparent characters through which the light of the blue LEDs could shine, so "Irumine" is apparently "Illuminate" and "kitoppu" is apparently "Keytop".
Another search allowed me to discover that "Surimu" is itself derived from English, and means "slim".
So presumably what it got the light typing feel by adopting was "low-profile key tops".