● Commentary There was an out-of-the-door mystery book that conveyed the sexual culture that flourished in the Edo period to the present - The amazing contents of the ancient sexual technique guide book "Osamekamaijo" introduced in the bestseller "Edo no Sexuality" (written by Shinichiro Watanabe / published by Shinchosha), which has been reprinted since its publication in 06! - Abundant and deep, the secret technique and wisdom of radical sexuality are revived in modern times!　　In the "Osame Kamaijo", which is thought to have been written by the owner of the so-called women's house, the method of "osame" = management and "kamai" = guidance of courtesans is listed in "jo" = bullet points. These were handed down as secret heirlooms and became valuable books that were not widely known to the public. In it, various secret techniques to respond to the propensity and preferences of all customers, secret methods to increase pleasure and how to use secret tools, and "36 types" of mating positions reminiscent of 48 moves are explained in detail. SUCH AN E-DO PERIOD HOW TO SEX...