I was looking at some of the claims made in the section about Japan & had a hard time finding anything to support them. Specifically, I found 2 claims:
1. Japanese children were swaddled & placed into "ejoko" boxes, which gave them a psychological fear of being surrounded or enclosed.
A Google search for "ejoko", "ejoko japan", "ejoko box japan" turns up nothing, as far as I can tell. The reference in the text is to deMause's own journal.
2. Incest, particularly mother-son incest, is rampant in Japan.
This seems to be a media perpetuated myth as far as I can tell. The reference in the book is a reference to an article published by deMause in his own journal. Wikipedia references historical incest (which occured in many countries, not only Japan) & a Google search only produces results either a) discrediting this claim or b) citing deMause.
It could be that no one else has research or published about these topics, but it seems unlikely. It could be that such research or publications have been suppressed to "save face". I just don't know.
Maybe someone with better Google skills than I can find some supporting evidence. Thanks in advance for any feedback.