I pretty much have my dream bath. 8)
My bath/shower room is similar to the one mikew describes (same maker, in fact). It looks pretty much like this:
but without the sliding glass doors to the outside. As Repairmanjack notes, the shower area where you get clean is to the right of the soaker tub.
There is a control system which automatically fills the tub to the desired depth and temperature (and which can have a different programmed temperature from the shower water), the shower area has the Thermo-floor to prevent cold footsies in the winter, and the large tub comfortably fits parent and child (children generally don't bathe alone in Japan):
I love that bath.
We did not get the automatic hose-to-the-washer option -- doing the bucket brigade thing is our bit of LBYM. The washer is in the adjacent room, with the sink, so it is not a big deal.
Our toilet, in its own room, looks pretty much like this:
Features: bidet (front or back, as desired) with adjustable strength, temperature and nozzle motion, heated toilet seat, and hand-washing faucet and sink built into the top of the tank. We did not get the optional automatic electronic flush system.
Have to say that bathrooms are one of the best things about living in Japan.
Bpp