[ashdksnndck]

From a plumbing perspective, the Toto is no different from one of the basic units, you just attach the valve to the toilet’s water supply. For electricity, it depends on your situation but if you have an outlet nearby (eg. where you would plug your hair dryer or electric toothbrush) you can just plug into that. The plug doesn’t need to be directly behind the toilet, you run a cord to it.

[VTimofeenko]

Depending on the code, a separate outlet and/or a circuit might be required

[nunez]

Get an outdoor-rated, thick gauge extension cord and plug it into a GFCI outlet. There is a teeny-tiny chance of electric shock during thunderstorms, but GFCI will shut the circuit quickly, usually. Consult an electrician before doing this. Or just get a GFCI outlet installed near the toilet. That's safer!

[VTimofeenko]

We thought about getting a bidet installed and two electricians said that the (maybe freshly revised?) code explicitly demands a new circuit. It cannot branch off a "countertop" outlet that is meant to feed a hair dryer or something.

[ashdksnndck]

Spend more time talking to electricians and before you know it, you’ll have a new panel!