It is very interesting for us Japanese to read a this kind of book written by a foreign author. But there is one thing to be disappointed that Mr. Leupp didn't treat before Edo period so minutely, because male homosexuality in Japan was much more popular and prosper in pre-Edo period both in samurai society and in the aristocracy, the priesthood also than in Edo period, as many Japanese recognize. From Insei period on, especially in late-Kamakura, Muromachi to Momoyama period, male-male love was highly estimated and enthusiastically celebbrated, and almost of all Shogun i.e. supreme commanders, Daimyo i.e. war lords et Tenno i.e. emperors had their male lovers. Some of famous Daimyo and Tenno never married nor had any heterosexual relationship , for they thought to abstain from sex with women is a brave , manly and pious behavior. There 're so many documents & literal texts e. g. Anthology of paiderastia just like the Greek Musa paidike by Straton. Even quasi-marriage ceremony between men NENKEI was usually performed, and several famous Shogun & Daimyo were assasinated out of male-love jealousy or homoerotical troubles. On the other hand, Edo period was nothing but a slow and long decline process of male homosexuality which was vulgalized & commercialized. Yet, even in Meiji period , pederasty was more popular than heterosexuality among students. And Ko-ha i.e. manly students engaged in pederasty , on the contrary Nan-pa i.e. soft students loved women, but the latter was despised as effeminate.Anyhow some readers may misunderstand as if in Japan male homosexuality became most vigorous in Tokugawa period. However I would like to point out that such a conception is not correct . I want to comment more, but night's candles are burnt out, so I mugt go to bed now. Anyway after ancient Greek , only Japanese could have enhanced male homosexuality to highly ethical valued SHUDO i.e. the way of male love. And I hope many people study Japanese culture, history & literature more.