R will not reset the game. I get no reaction or response from the game at all when I press R.
1 will not empty my hands if I'm holding the Hitachi. Neither will activating 2, 3 or 4 drop the Hitachi and activate the correspond hand activity.
E will not place the Hitachi down, though summoning a new object, E will pick the object up. And E again will place the object down, however the Hitachi remains in my hand the entire time.
Picking up a weapon, same thing, the character will hold both the weapon and the Hitachi. When I attempt to fire the weapon, it instead drops the weapon and turns the Hitachi on.