Ampontan at Japundit suggests the Pavilion of the Sex Gods in Utsunomiya.
Here’s a Japanese restaurant in China where you could, until recently, eat sushi off women’s naked bodies. I suggest visiting in protest!
And finally, here’s a vacation idea that I doubt anyone would recommend…sowing rice the old fashioned way, including manually lugging a huge piece of lumber across the field to flatten it. (I feel like I would like to try it, just once…obviously this is the curiosity of the ignorant.)