Aah, I wish I was Momiji............
In europe it rarely goes further than a bathroom with a bathtub and toilets in a separate room. Having a space to shower and a bathtub in a single room is pretty rare, I've only seen that once.
Of course you can still shower in a bathtub and fill it afterwards but waiting sucks and it takes too much water, no one bothers.
No Anon. That's very kimo of you.