Off course, Japanese have produced many master piece of sanitary items, and they are the giants in this industry. Anyway there are many variety of bathroom decor ideas and each idea depends on the requirements of clients. I would suggest you to visit http://www.bathroommyplacewithstyle.com for finding better and maximum number of collection of bathroom interiors.
Sounds like you are talking about a Japanese theme specifically. You could put up a painting or photo of Mount Fuji. And maybe an incense burner.
When I think of Asian, I picture cherry blossom trees; I also picture bamboo.... Bamboo soap dishes, bench, etc. I also picture orchids. Anything that could bring those textiles and colors together.
I would like to decorate my new bathroom with an Asian inspired theme. I'd like for it to be very peaceful. (The cabinets are a cherry wood color and the shower walls are a light brown.) It's not a master bathroom, so it's smaller. I was thinking of putting a bonsai tree (I want green in there) and candles. I'm not a creative person so I'm open to any ideas people have to make the bathroom very zen-like. Does anyone have any suggestions and/or links to something that I can?? I'd appreciate any suggestions or even portrait ideas. Thanks!