Some highlights:

Last November, Tokyo police, acting on a tip, raided a condominium in the Ikebukuro district and found a mass of naked men and women panting, humping and slithering about, in what was a free spirited orgy. Arrested in the raid was a worker in the financial sector who had been operating a secret orgy club as side business.

For his 30,000 yen tour fee, the reporter claims he exhausted his supply of condoms, having made it with four different females during the two-hour tour. "A bargain," he remarks with a grin. So the next time you see a bus running along on the streets of Tokyo with its curtains drawn, it's doubtful you'll be looking at the Red Cross Bloodmobile.

http://mdn.mainichi.co.jp/waiwai/0402/0203orgy.html/