Just when you thought you'd heard of every Japanese quirk and perversion... Shindai!!! The art of Japanese bed-fighting. With the tag-line "The most exotic, initimate Eastern eroticism ever revealed the the Western World", you could be mistaken for thinking that the book is showing readers a hidden world of Japanese sex.
The book it is claimed to be written by Ellen Schumaker and Tomi Nobunuga, described as Madam Nobunuga. Telling the secret martial bedroom art practiced between samurai warriors and geisha. However the book was actually a satirical joke claimed to have been invented by British humourist and hoaxer Jonathon Routh.
The book has done the rounds of the Internet for years, often mistakenly assumed to be genuine. However the myth still persists, and many websites posting about the book with slight disbelief but still not that surprised that such a bedroom based martial art could ever come from Japan. A testament to how well the book maintains its joke and how weird we all think the Japanese are.