The problem isn't running your commodity devices on the different frequency (most stuff you mentioned transforms and rectifies the wall power, so it's all DC an

The problem isn't running your commodity devices on the different frequency (most stuff you mentioned transforms and rectifies the wall power, so it's all DC anyway). The problem is getting the grid to work together. West Japan can't send enough power over to East Japan, because the signals don't line up, to leave out the technical bits.