>Does he have a renegade publisher who tacked on all this stuff about UFOs, Jesus, and Mu to his otherwise tame book about Japanese history?
This had me curious who exactly is publishing this fine work of f̶i̶c̶t̶i̶o̶n̶ (oops - academic research).
Appearently, Inner Traditions USA is publishing it (found under the Mythology & Legends section). Also known as Bear & Company they're known for putting out literature that covers topics such as astrology, New Age spiritualism, mysticism, esotericism, &c. Basically, pseudo-science from very, very fringe authors. Basically, books so out there only a schizophrenic with a very diverse imagination could find convincing.
Now I'd write this off as Shii wanting to make a quick buck. But I doubt this ``stuff'' honestly sells more than 100 copies - if that. So, I think, hes completely lost his mind and believes this stuff.