A Japanese toilet company TOTO has a showroom in Shinjuku 新宿 Tokyo. Many recent model toilets are displayed there. This place is like a toilet museum. It is called TOTO Tokyo Center Showroom (TOTO東京センターショールーム).
TOTO Tokyo Center Showroom
WASHLET is TOTO's brand name and means electrical shower toilet seat (bidet).
Another company LIXIL calls it SHOWER TOILET.
There are real restrooms (toilets) outside the showroom.
There are many buttons beside the toilet seat. Don't worry how to use.
After you go to the toilet, simply you need to use just these 4 buttons on the picture below.
Website (in Japanese)
It is located near Shinjuku 新宿 Station. This place is on the 7F and 8F of the building.
Business hours: 10:00 am - 5:00 pm
Wednesdays are closed except pre-national holiday.
It is located in Narita 成田 International Air Port.
How about this place?