Bun washing from a farting toilet does not sound good to me either. However, once you have used one of the Toto washlets you will avoid using a regular seat again!

Sounds like there may be a venting problem with your plumbing. Time to get the Apartment management involved.

: My toilet keeps farting! I'm not a plumber at all, but I hear some sounds from upstairs and then my toilet bubbles. I know that bumm water washing may be the new rage in Japan, but I'm not thrilled at the idea myself. The apartment complex is barely half a year old, so everything else I've read pretty much refers to older apartment and septic systems.