is mother and son incest common in japan?

Incest, including mother-son relationships, is considered taboo and illegal in Japan, as it is in many other countries. While there may be depictions of incestuous relationships in certain forms of media like anime or manga, these are fictional and do not reflect real-life practices or societal norms. In general, incest is not a common or accepted behavior in Japan or most cultures worldwide. It's important to differentiate between fictional portrayals and real-life behavior.