The unique electrostatic design of Topre switches requires no physical mechanical coupling and therefore key switch bounce/chatter is eliminated.

Ultimately, the keyboard is designed to keep you from ever leaving the home row, relying on key combos and a perfect, near-symmetrical layout as you ease into the code haze. There's something incredibly compelling about a keyboard this simple and beautiful, built to last a lifetime.

If you really want to get technical, you can flip some DIP switches to reassign keys to your preference.
The HHKB should be unplugged while changing the DIP switch settings; otherwise the changes may not be recognized / cause of the failure.